Question

Equação de Y + 2Y +20 - 50 = 180

Answer 1

Resposta:

$\sf \: y + 2y + \colorbox{purple}{20 - 50}= 180$

$\sf \:y + 2y\colorbox{purple}{ - 30} = 180$

$\sf \:\colorbox{purple}{y} + \colorbox{purple}{2y} - 30 = 180$

$\sf \:\colorbox{purple}{3y} - 30 = 180$

$\sf \:3y - 30 = 180$

$\sf \:3y - 30 + \colorbox{purple}{30} = 180 + \colorbox{purple}{30}$

$\sf \:3y = 210$

$\sf \:3y = 210 \\ \frac{\sf \:3y}{\colorbox{purple}{3}} = \frac{\sf \:210}{\colorbox{purple}{3}}$

Então:

$\sf \:y = 70$