-21=7(y+1)

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Solution for -21=7(y+1) equation:


Simplifying
-21 = 7(y + 1)

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

Solving
-21 = 7 + 7y

Solving for variable 'y'.

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

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

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

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

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

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

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

Simplifying
y = -4

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