Question

Aflati numarul x din egalitatea 5•53-{4•[5+(x-2)•7]:3}•6=1

Answer 1

5 × 53 - {4 × [5 + (x-2) × 7]:3} × 6  =1
265 - 1 = [4 × (5 + 7x - 14) : 3] × 6 
264 = [4 × (7x - 9) : 3] × 6
(28x - 36) : 3 = 44
28x - 36 = 3 × 44
28x = 132 + 36
28x = 168
x = 168 : 28 = 6