3(7y-21)=63

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Solution for 3(7y-21)=63 equation: 


Simplifying
3(7y + -21) = 63

Reorder the terms:
3(-21 + 7y) = 63
(-21 * 3 + 7y * 3) = 63
(-63 + 21y) = 63

Solving
-63 + 21y = 63

Solving for variable 'y'.

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

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

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

Combine like terms: 63 + 63 = 126
21y = 126

Divide each side by '21'.
y = 6

Simplifying
y = 6

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