-4y+7=-21

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Solution for -4y+7=-21 equation: 


Simplifying
-4y + 7 = -21

Reorder the terms:
7 + -4y = -21

Solving
7 + -4y = -21

Solving for variable 'y'.

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

Add '-7' to each side of the equation.
7 + -7 + -4y = -21 + -7

Combine like terms: 7 + -7 = 0
0 + -4y = -21 + -7
-4y = -21 + -7

Combine like terms: -21 + -7 = -28
-4y = -28

Divide each side by '-4'.
y = 7

Simplifying
y = 7

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