Question

Aflati valoarea lui x din egalitatea 7-[100×52:13-5×(360-2×X]:20=2

Answer 1

$7-[100*52:13-5*(360-2x)]:20=2 \\ 7-(100*4-1800+10x):20=2 \\ 7-(400-1800+10x):20=2 \\ 7-(-1400+10x):20=2 \\ 7-(-70+ \frac{x}{2})=2 \\ 7+70- \frac{x}{2} =2 \\ 77- \frac{x}{2} =2 \\ 77-2= \frac{x}{2} \\ 75= \frac{x}{2} \\ x=150$