Question

Solve for y6(y-7)-3y= - 21Simplify your answer as much as possible

Answer 1

ANSWER

$y=7$

EXPLANATION

Given;

$6\left(y-7\right)-3y=-21$

Expand ;

$\begin{gathered} 6\left(y-7\right)-3y=-21 \\ 6y-42-3y=2-1 \end{gathered}$

Group like terms and solve;

$\begin{gathered} 6y-42-3y=-21 \\ 3y-42=-21 \\ \end{gathered}$

Add 42 to both sides;

$\begin{gathered} 3y-42+42=-21+42 \\ 3y=21 \end{gathered}$

Divide both sides by 3;

$\begin{gathered} \frac{3y}{3}=\frac{21}{3} \\ y=7 \end{gathered}$