7(3y+4)=21

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Solution for 7(3y+4)=21 equation:


Simplifying
7(3y + 4) = 21

Reorder the terms:
7(4 + 3y) = 21
(4 * 7 + 3y * 7) = 21
(28 + 21y) = 21

Solving
28 + 21y = 21

Solving for variable 'y'.

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

Add '-28' to each side of the equation.
28 + -28 + 21y = 21 + -28

Combine like terms: 28 + -28 = 0
0 + 21y = 21 + -28
21y = 21 + -28

Combine like terms: 21 + -28 = -7
21y = -7

Divide each side by '21'.
y = -0.3333333333

Simplifying
y = -0.3333333333

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