20y-15=18y-7

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Solution for 20y-15=18y-7 equation:


Simplifying
20y + -15 = 18y + -7

Reorder the terms:
-15 + 20y = 18y + -7

Reorder the terms:
-15 + 20y = -7 + 18y

Solving
-15 + 20y = -7 + 18y

Solving for variable 'y'.

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

Add '-18y' to each side of the equation.
-15 + 20y + -18y = -7 + 18y + -18y

Combine like terms: 20y + -18y = 2y
-15 + 2y = -7 + 18y + -18y

Combine like terms: 18y + -18y = 0
-15 + 2y = -7 + 0
-15 + 2y = -7

Add '15' to each side of the equation.
-15 + 15 + 2y = -7 + 15

Combine like terms: -15 + 15 = 0
0 + 2y = -7 + 15
2y = -7 + 15

Combine like terms: -7 + 15 = 8
2y = 8

Divide each side by '2'.
y = 4

Simplifying
y = 4

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