Răspuns:
Explicație pas cu pas:
9x-18=-63
9x=-63+18
9x=-45
X=5
8x+2=10x-14
2+14=10x-8x
16=2x
X=8
1-4(-5x+10)=21
1+20x-40=21
20x=40-1+21
20x=60
X=3
X+3=0 ; x-7=0
X=-3 ; x=7(nu mai stiu sigur )
5x+15=10x-10
5x=25
X=5
-2x+10=-24x-16+56
22x=-10-16+56
22x=30
X=30/22
5x-10-7x-21+35=0
-2x=10+21-35
-2x=-4 |(-1)
X=2
-2x+6=0 ;x+3=0
-2x=-6 |÷(-2) x=-3
X=3
