3y-7+4y=9+3y+12

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Solution for 3y-7+4y=9+3y+12 equation:


Simplifying
3y + -7 + 4y = 9 + 3y + 12

Reorder the terms:
-7 + 3y + 4y = 9 + 3y + 12

Combine like terms: 3y + 4y = 7y
-7 + 7y = 9 + 3y + 12

Reorder the terms:
-7 + 7y = 9 + 12 + 3y

Combine like terms: 9 + 12 = 21
-7 + 7y = 21 + 3y

Solving
-7 + 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.
-7 + 7y + -3y = 21 + 3y + -3y

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

Combine like terms: 3y + -3y = 0
-7 + 4y = 21 + 0
-7 + 4y = 21

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 = 28
4y = 28

Divide each side by '4'.
y = 7

Simplifying
y = 7

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