7(7y-9)=28y

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Solution for 7(7y-9)=28y equation:


Simplifying
7(7y + -9) = 28y

Reorder the terms:
7(-9 + 7y) = 28y
(-9 * 7 + 7y * 7) = 28y
(-63 + 49y) = 28y

Solving
-63 + 49y = 28y

Solving for variable 'y'.

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

Add '-28y' to each side of the equation.
-63 + 49y + -28y = 28y + -28y

Combine like terms: 49y + -28y = 21y
-63 + 21y = 28y + -28y

Combine like terms: 28y + -28y = 0
-63 + 21y = 0

Add '63' to each side of the equation.
-63 + 63 + 21y = 0 + 63

Combine like terms: -63 + 63 = 0
0 + 21y = 0 + 63
21y = 0 + 63

Combine like terms: 0 + 63 = 63
21y = 63

Divide each side by '21'.
y = 3

Simplifying
y = 3

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