Exercitiul 11, va rog, e urgent!

Exercitiul 11 Va Rog E Urgent class=

Răspuns :

a) 9x-18= -63
9x= -63+18
9x= -45
x= -45/9
x= -5

c) 8x+2=10x-14
8x-10x= -14-2
-2x= -16
x=16/2
x=8

f)5x-10-7x-21+35=0
-2x-31+35=0
-2x+4=0
-2x= -4 
x=4/2
x=2