9(y-1)=4y+21

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Solution for 9(y-1)=4y+21 equation:


Simplifying
9(y + -1) = 4y + 21

Reorder the terms:
9(-1 + y) = 4y + 21
(-1 * 9 + y * 9) = 4y + 21
(-9 + 9y) = 4y + 21

Reorder the terms:
-9 + 9y = 21 + 4y

Solving
-9 + 9y = 21 + 4y

Solving for variable 'y'.

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

Add '-4y' to each side of the equation.
-9 + 9y + -4y = 21 + 4y + -4y

Combine like terms: 9y + -4y = 5y
-9 + 5y = 21 + 4y + -4y

Combine like terms: 4y + -4y = 0
-9 + 5y = 21 + 0
-9 + 5y = 21

Add '9' to each side of the equation.
-9 + 9 + 5y = 21 + 9

Combine like terms: -9 + 9 = 0
0 + 5y = 21 + 9
5y = 21 + 9

Combine like terms: 21 + 9 = 30
5y = 30

Divide each side by '5'.
y = 6

Simplifying
y = 6

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