4. 54+8 la puterea a 2 = 54+64=118
5.
4x+12=0
4x=--12
x= - 12/4
x= -3
4*(-3)+12=0
3+y= -2y -60
y+2y= -60-3
3y = -63
y= -63/3
y=-21
3+(-21)=-2(-21)-60
-18=-18
