已知:x+2y+3m=10,4x+3y+2m=15,求x+y+m的值是?

问题描述:

已知:x+2y+3m=10,4x+3y+2m=15,求x+y+m的值是?

(x+2y+3m)+(4x+3y+2m)
=5(x+y+m)
=10+15
=25
x+y+m=25÷5=5