5(x-3)=55 4(X+8.2)=40.8 (X-9)/7=6
问题描述:
5(x-3)=55 4(X+8.2)=40.8 (X-9)/7=6
答
5(x-3)=55
x-3=11
x=14
4(X+8.2)=40.8
x+8.2=10.2
x=2
(X-9)/7=6
x-9=42
x=51