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Solve the system of equations:

[tex]\[
\begin{array}{l}
-2x + 3y = -12 \\
2x + y = 4
\end{array}
\][/tex]

1. Add the two equations to eliminate [tex]\(x\)[/tex]:
[tex]\[ 4y = -8 \][/tex]

2. Solve for [tex]\(y\)[/tex]:
[tex]\[ y = -2 \][/tex]

3. Substitute [tex]\(y = -2\)[/tex] back into the first equation to solve for [tex]\(x\)[/tex]:
[tex]\[ -2x + 3(-2) = -12 \][/tex]
[tex]\[ -2x - 6 = -12 \][/tex]
[tex]\[ -2x = -6 \][/tex]
[tex]\[ x = 3 \][/tex]

What is the solution to the system of equations?
[tex]\[ (3, -2) \][/tex]


Sagot :

Alright, let's solve this system of equations step by step.

Given equations:
[tex]\[ \begin{array}{l} -2x + 3y = -12 \quad (1) \\ 2x + y = 4 \quad (2) \end{array} \][/tex]

Step 1: Add the two equations to eliminate [tex]\(x\)[/tex]:
[tex]\[ (-2x + 3y) + (2x + y) = -12 + 4 \][/tex]
Combining like terms:
[tex]\[ (3y + y) = -12 + 4 \implies 4y = -8 \][/tex]

Step 2: Solve for [tex]\(y\)[/tex]:
[tex]\[ 4y = -8 \implies y = \frac{-8}{4} = -2 \][/tex]

Step 3: Substitute [tex]\(y = -2\)[/tex] back into one of the original equations to solve for [tex]\(x\)[/tex].
Let's use equation (2):
[tex]\[ 2x + y = 4 \][/tex]
Substitute [tex]\(y = -2\)[/tex]:
[tex]\[ 2x - 2 = 4 \][/tex]
Solving for [tex]\(x\)[/tex]:
[tex]\[ 2x = 4 + 2 \implies 2x = 6 \implies x = \frac{6}{2} = 3 \][/tex]

So, the solution to the system of equations is:
[tex]\[ (x, y) = (3, -2) \][/tex]