4(y+3)=21

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Solution for 4(y+3)=21 equation: 


Simplifying
4(y + 3) = 21

Reorder the terms:
4(3 + y) = 21
(3 * 4 + y * 4) = 21
(12 + 4y) = 21

Solving
12 + 4y = 21

Solving for variable 'y'.

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

Add '-12' to each side of the equation.
12 + -12 + 4y = 21 + -12

Combine like terms: 12 + -12 = 0
0 + 4y = 21 + -12
4y = 21 + -12

Combine like terms: 21 + -12 = 9
4y = 9

Divide each side by '4'.
y = 2.25

Simplifying
y = 2.25

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