Question

Solve the system of equations. 4x + 7y = 6 and 6x + 5y = 20

Answer 1

have you covered "solving by elimination" yet?

Answer 2

\(\large \begin{array}{llll}
4x + 7y = 6& {\color{red}{ \times -5}}\implies &-20x\cancel{-35y}=-30\\
6x + 5y = 20& {\color{red}{ \times 7}}\implies &\quad 42x\cancel{+35y}=140\\
\hline\\
&&\quad \square x\qquad \qquad =\square
\end{array}\)

solve for "x"
then substitute that found "x" on either equation to get "y"