解方程:3.5(X—5)+0.5X=4.25(X是未知數)

解方程:3.5(X—5)+0.5X=4.25(X是未知數)

3.5(X—5)+0.5X=4.25
3.5x-17.5+0.5x=4.25
3.5x+0.5x=4.25+17.5
4x=21.75
x=5.4375