42=3y+15

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Solution for 42=3y+15 equation:


Simplifying
42 = 3y + 15

Reorder the terms:
42 = 15 + 3y

Solving
42 = 15 + 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.
42 + -3y = 15 + 3y + -3y

Combine like terms: 3y + -3y = 0
42 + -3y = 15 + 0
42 + -3y = 15

Add '-42' to each side of the equation.
42 + -42 + -3y = 15 + -42

Combine like terms: 42 + -42 = 0
0 + -3y = 15 + -42
-3y = 15 + -42

Combine like terms: 15 + -42 = -27
-3y = -27

Divide each side by '-3'.
y = 9

Simplifying
y = 9

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