5-(y-7)=21

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Solution for 5-(y-7)=21 equation:


Simplifying
5 + -1(y + -7) = 21

Reorder the terms:
5 + -1(-7 + y) = 21
5 + (-7 * -1 + y * -1) = 21
5 + (7 + -1y) = 21

Combine like terms: 5 + 7 = 12
12 + -1y = 21

Solving
12 + -1y = 21

Solving for variable 'y'.

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

Add '-12' to each side of the equation.
12 + -12 + -1y = 21 + -12

Combine like terms: 12 + -12 = 0
0 + -1y = 21 + -12
-1y = 21 + -12

Combine like terms: 21 + -12 = 9
-1y = 9

Divide each side by '-1'.
y = -9

Simplifying
y = -9

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