Given the equation: x + 2y = -4
Solve for y mean , make the term y in one side
x + 2y = -4
subtract x from both sides
x + 2y - x = -4 - x
2y = -x - 4
Divide both sides by 2
2y/2 = (-x - 4 )/2
y = (-1/2) x - 2
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