7(y+9)=42

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Solution for 7(y+9)=42 equation: 


Simplifying
7(y + 9) = 42

Reorder the terms:
7(9 + y) = 42
(9 * 7 + y * 7) = 42
(63 + 7y) = 42

Solving
63 + 7y = 42

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 + 7y = 42 + -63

Combine like terms: 63 + -63 = 0
0 + 7y = 42 + -63
7y = 42 + -63

Combine like terms: 42 + -63 = -21
7y = -21

Divide each side by '7'.
y = -3

Simplifying
y = -3

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