67x=134 67x÷67=134÷67 X=2 (70)1.5(x+1.6)=3.6 1.5x+2.4=3.6 1.5x=3.6-2.4 1.5x=1.2 1.5x÷1.5=1.2÷1.5 X=0.8 (71)2(x-3)=5.8 2x-6=5.8 2x-6+6=5.8+6 2x=11.8 2x÷2=11.8÷2 X=5.9 (72)65x+7=137 65x+7-7=137-7 65x=130 65x÷65=130÷65 X=2 (73) 9x+4×2.5=91 9x+10=91 9x+10-10=91-10 9x=81 9x÷9=81÷9 X=9
(74) 4.2 x+2.5x=134 6.7x=134 6.7x÷6.7=134÷6.7 X=20 (75) 10.5x+6.5x=51 17x=51 17x÷17=51÷17 X=3 (76) 89x-43x=9.2 46x=9.2 46x÷46=9.2÷46 X=0.2
(77) 5x-45=100 5x-45+45=100+45 5x=145 5x÷5=145÷5
X=29 (78) 1.2x-0.5x=6.3 0.7x=6.3 0.7x÷0.7=6.3÷0.7 X=9 (79) 23.4=2x 2x÷2=23.4÷2 X=11.7 (80) 4x-x=48.6 3x=48.6 3x÷3=48.6÷3 X=16.2 (81) 4.5x-x=28 3.5x=28 3.5x÷3.5=28÷3.5 X=8 (82)X-5.7=2.15
X=5.7+2.15
X=7.85 (83)5X-2X=18 3x=18 3x÷3=18÷3 X=6 (84)3X+0.7=7 3x+0.7-0.7=7-0.7 3x=6.3 3x÷3=6.3÷3 X=2.1 (85) 3.5×2= 4.2+x 4.2+x=7 X=7-4.2 X=2.8 (86) 26×1.5= 2x+10 2x+10=39 2x+10-10=39-10 2x=29 2x÷2=29÷2 X=14.5
(87) 0.5×16―16×0.2=4x 4x=4.8 4x÷4=4.8÷4 X=1.2 (88) 13 9.25-X=0.403 X=139.25-0.403
13
X=138.847 (89) 18.9÷X=0. 3 X=18.9÷0.3 X=63 (90) 23x=14x+27 23x-14x=14x-14x+27 9x=27 9x÷9=27÷9 X=3 (91) x+14x=75 15x=75 15x÷15=75÷15 X=5 (92)95-5x=80 95-5x+5x=80+5x 5x+80=95 5x+80-80=95-80 5x=15 X=3 (93)1.8 +6x=54 6x=54-1.8 6x=52.2 6x÷6=52.2÷6 X=8.7 (94) 6.7x-60.3=6.7 6.7x=60.3+6.7 6.7x=67 6.7x÷6.7=67÷6.7 X=10 (95) 9+4x=53 4x=53-9 4x=44 4x÷4=44÷4 X=11 (96) 2x+8=16 2x=16-8 2x=8 2x÷2=8÷2 X=4 (97) 20x-14x=24 6x=24 6x÷6=24÷6 X=4 (98) x+7x=8
8x=8 X=1 (99) 9x-3x=6 6x=6 X=1 (100)6x-8=4 6x-8+8=4+8 6x=12 X=2 (101) 5x+x=9 6x=9 6x÷6=9÷6 x=1.5 (102) 8x-8=6x 8x-8+8=6x+8 8x-6x=6x-6x+8 2x=8 2x÷2=8÷2 X=4 (103) 45x=20 45x÷45=20÷45 X=25 (104) 2x-6=12 2x-6+6=12+6 2x=18 2x÷2=18÷2 X=9 (105) 7x+7=14 7x+7-7=14-7 7x=7 7x÷7=7÷7 X=1 (106) 6x-6=0 6x-6+6=0+6 6x=6 X=1 (107) 5x+6=11 5x+6-6=11-6 5x=5 X=1 (108) 2x-8=10 2x-8+8=10+8 2x=18 14
X=9 (109) 2.5x-8=4 2.5x-8+8=4+8 2.5x=12 2.5x÷2.5=12÷2.5 X=4.8 (110) x-34=7 X-34+34=7+34 X=7.75 (111) 3x+7=28 3x+7-7=28-7 3x=21 3x÷3=21÷3 X=7 (112) 3x-7=26 3x-7+7=26+7 3x=33 3x÷3=33÷3 X=11 (113) 9x-x=16 8x=16 8x÷8=16÷8 X=2 (114) 24x+x=50 25x=50 25x÷25=50÷25 X=2 (115) 1.2x-8=4 1.2x-8+8=4+8 1.2x=12 1.2x÷1.2=12÷1.2 X=10 (116) 3x-8=31 3x-8+8=31+8 3x=39 3x÷3=39÷3 X=13 (117) 6x+6=12 6x+6-6=12-6 6x=6 X=1 (118) 3x-3=3 3x-3+3=3+3 3x=6 3x÷3=6÷3 X=2 (119) 5x-3x=4 2x=4 2x÷2=4÷2 X=2 (120) 2x+16=19 2x+16-16=19-16 2x=3 2x÷2=3÷2 X=1.5 (121) 5x+8=19 5x+8-8=19-8 5x=11 5x÷5=11÷5 X=2.2 (122) 14-6x=8 14-6x+6x=8+6x 6x+8-8=14-8 6x=6 X=1 (123) 15+6x=27 6x+15-15=27-15 6x=12 6x÷6=12÷6 X=2 (124) 5-8x=4 5-8x+8x=4+8x 8x+4-4=5-4 8x=1 8x÷8=1÷8 X=0.125 (125) 7x+8=15 7x+8-8=15-8 7x=7 X=1 (126) 9-2x=1 9-2x+2x=1+2x 2x+1-1=9-1 2x=8 2x÷2=8÷2 X=4 (127) 4+5x=9
15
5x+4-4=9-4 5x=5 X=1 (128) 10-x=8 X=10-8 X=2 (129) 8x+9=17 8x+9-9=17-9 8x=8 X=1 (130) 9+6x=15 6x+9-9=15-9 6x=6 X=1 (131) x+9x=4+7 10x=11 10x÷10=11÷10 X=1.1 (132) 2x+9=17 2x+9-9=17-9 2x=8 2x÷2=8÷2 X=4 (133) 8-4x=6 8-4x+4x=6+4x 4x+6-6=8-6 4x=2 4x÷2=2÷4 X=0.5 (134) 6x-7=28 6x-7+7=28+7 6x=36 6x÷6=36÷6 X=6
(135) 7x-9=20 7x-9+9=8+20 7x=28 7x÷7=28÷7 X=4 (136) x-56=1 X=56+1 X=57 (137) 8-7x=1
8-7x+7x=1+7x 7x+1-1=8-1 7x=7 X=1
(138) x-30=12 X-30+30=12+30 X=42 (139) 6x-21=21 6x-21+21=21+21 6x=42 6x÷6=42÷6 X=7 (140) 6x-3=6 6x-3+3=6+3 6x=9 6x÷6=9÷6 X=1.5 (141) 9x=18 9x÷9=18÷9 X=2 (142) 4x-18=14 4x-18+18=14+18 4x=32 4x÷4=32÷4 X=8 (143) 5x+9=11 5x+9-9=11-9 5x=2 5x÷5=2÷5 X=0.4 (144) 17-2x=11 17-2x+2x=11+2x 2x+11-11=17-11 2x=6 2x÷2=6÷2 X=3 (145) x+4+8=23 X+12=23 X=23-12 X=11 (146) 7x-12=9 7x-12+12=9+12 7x=21
16