-4y-15=2x+21

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Solution for -4y-15=2x+21 equation:


Simplifying
-4y + -15 = 2x + 21

Reorder the terms:
-15 + -4y = 2x + 21

Reorder the terms:
-15 + -4y = 21 + 2x

Solving
-15 + -4y = 21 + 2x

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '15' to each side of the equation.
-15 + 15 + -4y = 21 + 15 + 2x

Combine like terms: -15 + 15 = 0
0 + -4y = 21 + 15 + 2x
-4y = 21 + 15 + 2x

Combine like terms: 21 + 15 = 36
-4y = 36 + 2x

Divide each side by '-4'.
y = -9 + -0.5x

Simplifying
y = -9 + -0.5x

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