3(y-1)+4y=18

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Solution for 3(y-1)+4y=18 equation:


Simplifying
3(y + -1) + 4y = 18

Reorder the terms:
3(-1 + y) + 4y = 18
(-1 * 3 + y * 3) + 4y = 18
(-3 + 3y) + 4y = 18

Combine like terms: 3y + 4y = 7y
-3 + 7y = 18

Solving
-3 + 7y = 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 + 7y = 18 + 3

Combine like terms: -3 + 3 = 0
0 + 7y = 18 + 3
7y = 18 + 3

Combine like terms: 18 + 3 = 21
7y = 21

Divide each side by '7'.
y = 3

Simplifying
y = 3

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