Question

Aflati valoarea numarului natural x din egalitatile:
3+3*[3+3*(3+3*x)]=120

[(x*48):4+1]*5+15=500

Answer 1

3+3 x [3+3 x (3+3 x X)]=120
3 x[3+3 x(3+3 x X)]=117
3+3 x (3+3 x X)=39
3x(3+3 x X)=36
3+3 x X=12
2 x X=4
x=2

[(X x 48):4+1]x 5 +15=500
[(X x 48):4+1]x 5=485
(X x 48):4+1=97
(X x 48):4=96
X x 4=24
x=6