Question

L)5×-7(-2-5×)=13(1-2×)-113.

Answer 1

Explicație pas cu pas:

$5x - 7(-2-5x) = 13(1-2x) - 113$

$5x + 14 + 35x = 13 - 26x - 113$

$40x + 14 = - 26x - 100 \\ 40x + 26x = - 100 - 14$

$66x = - 114$

$x = - \dfrac{114}{66} \iff x = - \dfrac{19}{11}$