Question

sa se calculeze 30-{[(6 ×a-28):2+24]:5+48}:13=25

Answer 1

30[($\frac{6a-28}{2}$+24]÷5+48)×$\frac{1}{13}$=25
30[($\frac{2(3a-14)}{2}$+24)÷5+48]×$\frac{1}{3}$=25
$30 ( \frac{3a-14+24}{5} +48 )$×$\frac{1}{3} =25$
$30( \frac{3a+10}{5} +48)$×$\frac{1}{3} =25$
$30$×$\frac{3a+10+240}{5}$×$\frac{1}{3} =25$
$6(3a+250)$×$\frac{1}{3} =25$
$\frac{6}{13} (3a+250)=25$
$\frac{18}{13}a+ \frac{1500}{13} =25$
$18a+1500=325$
$18a=325-1500$
$18a=-1175$
$a=- \frac{1175}{18}$