4X+2(90-X)=280咋解
问题描述:
4X+2(90-X)=280咋解
答
4x+180-2x=28
4x-2x=280-180
2x=100
x=50
答
4x + 2*90 -2x =280
2x+180 =280
2x=100
x=50
答
原式=4X+180-2X=280
2X=280-180
X=50
答
4X+2(90-X)=280
2x+90-x=140
2x-x=140-90
x=50
答
4X+2(90-X)=280
4x+180-2x=280
4x-2x=280-180
2x=100
x=50
答
2x+180=280
2x=100
x=50