7y+(y+3)=-21

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Solution for 7y+(y+3)=-21 equation:


Simplifying
7y + (y + 3) = -21

Reorder the terms:
7y + (3 + y) = -21

Remove parenthesis around (3 + y)
7y + 3 + y = -21

Reorder the terms:
3 + 7y + y = -21

Combine like terms: 7y + y = 8y
3 + 8y = -21

Solving
3 + 8y = -21

Solving for variable 'y'.

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

Add '-3' to each side of the equation.
3 + -3 + 8y = -21 + -3

Combine like terms: 3 + -3 = 0
0 + 8y = -21 + -3
8y = -21 + -3

Combine like terms: -21 + -3 = -24
8y = -24

Divide each side by '8'.
y = -3

Simplifying
y = -3

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