Question

Determjna numarul natural x din egalitatea : {[( × - 8( × 7 + 6 --5] -4 } × 3 - 2 = 10

Answer 1

{[(x-8)*7+6-5]-4}*3-2=10
{[(x-8)*7+6-5]-4}*3=10-2
{[(x-8)*7+6-5]-4}*3=12
{[(x-8)*7+6-5]-4}=12:3
{[(x-8)*7+6-5]-4}=4
(x-8)*7+6-5=4+4
(x-8)*7+6-5=8
(x-8)*7+6=8+5
(x-8)*7=13-6
(x-8)*7=7
x-8=7:7
x=1+8
x=9