Question

{[(2+a)×2+2]×2+2}×2+2=100÷2+2×2

Answer 1

{[4+2a+2]×2+2}×2+2=50+4
{(6+2a)×2+2}×2+2=54
[12+4a+2]×2+2=54
(14+4a)×2+2=54
28+8a+2=54
30+8a=54
8a=54-30
8a=24
a=24:8
a=3

Answer 2

{[(2+a)×2+2]×2+2}×2+2=100÷2+2×2
{[(2+a)×2+2]×2+2}×2+2=50+4
{[(2+a)×2+2]×2+2}×2+2=54
{[(2+a)×2+2]×2+2}×2=52
[(2+a)×2+2]×2+2=26
[(2+a)×2+2]×2=24
(2+a)×2+2=12
(2+a)×2=10
2+a=5
a=5-2
a=3
sper ca te-am ajutat