Question

150×(x-60%)=30解方程详细？

Answer 1

解: x-60%=30÷150
x-0.6=0.2
x=0.2+0.6
x=0.8

Answer 2

150×(x-60%)=30
150x-0.6×150=30
150x-90=30
150x=30+90
150x=120
x=120÷150
x=0.8

Answer 3

150×(x-60%)=30
5×(x-60%)=1
5x-5×0.6=1
5x=1+3
5x=4
x=0.8