7y+3=3y-21

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


Simplifying
7y + 3 = 3y + -21

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

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

Solving
3 + 7y = -21 + 3y

Solving for variable 'y'.

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

Add '-3y' to each side of the equation.
3 + 7y + -3y = -21 + 3y + -3y

Combine like terms: 7y + -3y = 4y
3 + 4y = -21 + 3y + -3y

Combine like terms: 3y + -3y = 0
3 + 4y = -21 + 0
3 + 4y = -21

Add '-3' to each side of the equation.
3 + -3 + 4y = -21 + -3

Combine like terms: 3 + -3 = 0
0 + 4y = -21 + -3
4y = -21 + -3

Combine like terms: -21 + -3 = -24
4y = -24

Divide each side by '4'.
y = -6

Simplifying
y = -6

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