y+2y-3=18

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Solution for y+2y-3=18 equation: 


Simplifying
y + 2y + -3 = 18

Reorder the terms:
-3 + y + 2y = 18

Combine like terms: y + 2y = 3y
-3 + 3y = 18

Solving
-3 + 3y = 18

Solving for variable 'y'.

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

Add '3' to each side of the equation.
-3 + 3 + 3y = 18 + 3

Combine like terms: -3 + 3 = 0
0 + 3y = 18 + 3
3y = 18 + 3

Combine like terms: 18 + 3 = 21
3y = 21

Divide each side by '3'.
y = 7

Simplifying
y = 7

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