Question

4x-(5-3x)=8x-(-3+7x)

Answer 1

$4x-(5-3x)=8x-(-3+7x) \\ \\ 4x-5+3x= 8x+3-7x \\ \\ 4x+3x-8x+7x= 3+5 \\ \\ 6x= 8 \qquad x= \dfrac{8}{6} \to \boxed{x= \dfrac{4}{3} }$

Espero que te sirva, salu2!!!!