2(21-7)=9y

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Solution for 2(21-7)=9y equation:


Simplifying
2(21 + -7) = 9y

Combine like terms: 21 + -7 = 14
2(14) = 9y

Multiply 2 * 14
28 = 9y

Solving
28 = 9y

Solving for variable 'y'.

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

Add '-9y' to each side of the equation.
28 + -9y = 9y + -9y

Combine like terms: 9y + -9y = 0
28 + -9y = 0

Add '-28' to each side of the equation.
28 + -28 + -9y = 0 + -28

Combine like terms: 28 + -28 = 0
0 + -9y = 0 + -28
-9y = 0 + -28

Combine like terms: 0 + -28 = -28
-9y = -28

Divide each side by '-9'.
y = 3.111111111

Simplifying
y = 3.111111111

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