Hi there! Hopefully this helps!
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Answer to solving for y: y = -2.
Answer for simplifying the expression: -12y - 4.
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We are given that x = -4y and that the equation is 3x + 2y = 20.
We need to evaluate.
3x + 2y = 20
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3(-4y) + 2y = 20.
To solve for y, y = -2.
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3(-4y) + 2(-2) = -12y - 4.