Question

4x-3y=127x-3y=3X=? Y=?

Answer 1

Step 1

Given;

$\begin{gathered} 4x-3y=12--(1) \\ 7x-3y=3---(2) \end{gathered}$

Step 2

Subtract equation 2 from 1

Hence,

$\begin{gathered} -3x=9 \\ -\frac{3x}{-3}=\frac{9}{-3} \\ x=-3 \end{gathered}$

Find the value y using equation 1

$\begin{gathered} 4(-3)-3y=12 \\ -12-3y=12 \\ -12-12=3y \\ \frac{3y}{3}=-\frac{24}{3}=-8 \end{gathered}$

x=-3 and y=-8