Question

Rezolva ecuatiile:
3×(x-53)=84

{5×[3×(2x-8)-8]-8}:4=3

Answer 1

1) x-53=28
x= 53+28
x= 81

2) 5x[3x(2x-8)-8]=12
3x(2x-8)-8= 12/5
(2x-8)-8= 12/5x1/3
2x-8=12/15+8
2x= 12/15+16
2x= 0,8+16
x= 16,8:2
x= 8,4