(1)12-3(9-x)=5(x-4)-7(7-x); (2)6x-17=13
(3)9-10x=10-9x (4)2(x－1)=4
(5)13x-26=13 (6)75
(7)2（6x-2）=8 (8)25x
(9)24x+12=132 (10)56=12x+8
(11)2x+4=30 (12)12x=11x
－5x=70 （12-6）=300 －79 (13)13x－12（x+2）=0 (14)67－12x=7
(15)（x-1）－（3x+2）= - （x-1） (16)18x-16x+18×1+50=70
(17)14×（60-x）×2=20x (18)4x+9(x+2)=200
(19)5x+4.5（103-x）=486
(20)100（x+1）+10x+（3x-2）+100（3x-2）+10x+（x+1）=1171
(21)2x+8=16 (22)x/5=10
(23)x+7x=8 (24)9x-3x=6
(25)6x-8=4 (26)5x+x=9
(27)x-8=6x (28)4/5x=20
(29)2x-6=12 (30)7x+7=14
(31)6x-6=0 (32)5x+6=11
(33)2x-8=10 (34)1/2x-8=4
(35)x-5/6=7 (36)3x+7=28
(37)3x-7=26 (38)9x-x=16
(39)24x+x=50 (40)6/7x-8=4
(41)3x-8=30 (42)6x+6=12
(43)3x-3=1
(45)2x+16=19
(47)14-6x=8 (48)15+6x=27
(49)5-8x=4
(50)7x+8=15 (46)5x+8=19
(44)5x-3x=4
