Question

Como resolver 25-x+x+12-x =31

Answer 1

Resolução da questão, veja:

$\mathsf{25-x+x+12-x= 31}}\\\\\\ \mathsf{25 -\diagup\!\!\!\!+x\diagup\!\!\!\!x+12-x = 31}}\\\\\\ \mathsf{-x = 31 -12-25}}\\\\\\ \mathsf{-x = -6}~\cdot~\mathsf{(-1)}\\\\\\ \large\boxed{\boxed{\boxed{\boxed{\boxed{\mathsf{x=6.}}}}}}}}}}}}}}}}}$

Espero que te ajude '-'