7y-15=3y

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Solution for 7y-15=3y equation:


Simplifying
7y + -15 = 3y

Reorder the terms:
-15 + 7y = 3y

Solving
-15 + 7y = 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.
-15 + 7y + -3y = 3y + -3y

Combine like terms: 7y + -3y = 4y
-15 + 4y = 3y + -3y

Combine like terms: 3y + -3y = 0
-15 + 4y = 0

Add '15' to each side of the equation.
-15 + 15 + 4y = 0 + 15

Combine like terms: -15 + 15 = 0
0 + 4y = 0 + 15
4y = 0 + 15

Combine like terms: 0 + 15 = 15
4y = 15

Divide each side by '4'.
y = 3.75

Simplifying
y = 3.75

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