(1)x-35%x=130
0.65x=130
0.65x÷0.65=130÷0.65
x=200;
(2)1.2%x+50=134
1.2%x+50-50=134-50
1.2%x=84
1.2%x÷1.2%=84÷1.2%
x=7000;
(3)175%x-
x=75 1 4
1.5x=75
1.5x÷1.5=75÷1.5
x=50;
(4)8.6x-60%x=20
8x=20
8x÷8=20÷8
x=2.5.