解
3(4-2x)=5x+23
12-6x=5x+23
-6x-5x=23-12
-11x=11
x=-1
5(x+8)-5=6(2x-7)
5x+40-5=12x-42
5x+35=12x-42
5x-12x=-35-42
-7x=77
x=-11
4(2y+3)+5(y-2)=8(1-y)
8y+12+5y-10=8-8y
13y+2=8-8y
13y+8y=8-2
21y=6
y=2/7