5(x+1.5)= 17.5 2(x-2.6)= 8 8(x-6.2)= 41.6


(x-3)÷2 = 7.5 x+2.4x = 5.1 过程
解:(x-3)雹滚÷2 = 7.5
(x-3)=7.5乘答肆纳2
x=15+3
x=18
解清没:x+2.4x = 5.1
3.4x=5.1
x=1.5
5(X+1.5)=17.5
请采纳。