Question

Equação do primeiro grau
Resolva
3X-10=X+90

Answer 1

$\large\bm{3x - 10 = x + 90} \\\large\bm{3x - 10 - x = 90} \\ \large\bm{3x - x = 90 + 10} \\ \large\bm{2x = 90 + 10} \\ \large\bm{2x = 100} \\ \\\large\bm{x = \dfrac{100}{2} } \\ \\ \bm{\large\boxed{\boxed{  { \large \bm{ x = 50}}}}}$

${\large\boxed{\boxed{  { \large \bm{ Bons~Estudos} }}}}$

Answer 2

3x-x=90+10

2x=100

x=100/2

x=50