Question

Solve this system of linear equations! Idk know these

Answer 1

x = 2, y = -2 → (2, -2)

Explanation:

`\left\{\begin{array}{ccc}4x=6-y\\-13x=-28-y&\text{change the signs}\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}4x=6-y\\13x=28+y\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad17x=34\qquad\text{divide both sides by 17}\\.\qquad x=2\\\\\text{Put it to the first equation:}\\4(2)=6-y\\8=6-y\qquad\text{subtract 6 from both sides}\\2=-y\to y=-2`