a)9(x-2)=-63
9x-18=-63
9x=-63+18
9x=-45
x=-5
b)5(x+3)=2(5x-5)
5x+15=10x-10
5x-10x=-10-15
-5x=-25
x=5
c)2(4x+1)=2(5x-7)
8x+2=10x-14
8x-10x=-14-2
-2x=-16
x=8
d)2(-x+5)=-8(3x+2)+56
-2x+10=-24x-16+56
-2x+24x=-16+56-10
22x=30
x=30/22=15/11
f)5(x-2)-7(x+3)+35=0
5x-10-7x-21+35=0
-2x=0+10+21-35
-2x=-4
x=2
Sper că te-am ajutat !
