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Solve this system.2x – y=1-3x + y = -5

User Sonny Boy
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Hello there. To solve this question, we'll have to remember some properties about system of equations.

Given the system:


\begin{cases}2x-y=1 \\ -3x+y=-5\end{cases}

We'll solve it by the addition method. Notice in the first equation we have - y, while we have a + y on the second equation.

Adding both equations, we have:


\begin{gathered} 2x-y-3x+y=1-5 \\ -x=-4 \end{gathered}

Multiply both sides of the equation by a factor of (-1)


x=4

Plugging this value in any of the two equations, we get:


\begin{gathered} 2\cdot4-y=1 \\ 8-y=1 \end{gathered}

Add y - 1 on both sides of the equation


\begin{gathered} 8-y+y-1=1+y-1 \\ y=7 \end{gathered}

Therefore the ordered pair that is solution for this system of equation is:


(x,y)=(4,7)

User Veky
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