Question

alguem me ajuda 12x+21=10x+16

Answer 1

$12x+21=10x+16\\\\\\ 12x -10x = 16 -21 \\\\\\\ 2x = -5\\\\\\\\\\\large\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{ x = \dfrac{-5}{2}}}}}}}}}}}}}}}}}$

Espero que te ajude :).