Question

3 3x + y = 13
x + y = 3

Explanation:

Step1: Subtract the two equations

$(3x + y) - (x + y) = 13 - 3$
Simplify: $2x = 10$

Step2: Solve for x

$x = \frac{10}{2} = 5$

Step3: Substitute x into second equation

Substitute $x=5$ into $x + y = 3$: $5 + y = 3$

Step4: Solve for y

$y = 3 - 5 = -2$

Answer:

$x=5$, $y=-2$