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 = -14
4y = -14

Divide each side by '4'.
y = -3.5

Simplifying
y = -3.5

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