Question

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Part 1
Solve the system by the addition method.
{x+3y=-2
3x+2y=1

Answer 1

x+3y=-2

3x+2y=1

-3(x+3y=-2) = -3x-9y=6

-3x-9y=6

3x+2y=1

→-7y=7⇔y=-1

we calculate x :

x+3y=-2

x-3=-2

x=-2+3=1

we check

3x+2y=1

3-2=1

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Explanation: