225=9(7+9+y)

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Solution for 225=9(7+9+y) equation:


Simplifying
225 = 9(7 + 9 + y)

Combine like terms: 7 + 9 = 16
225 = 9(16 + y)
225 = (16 * 9 + y * 9)
225 = (144 + 9y)

Solving
225 = 144 + 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.
225 + -9y = 144 + 9y + -9y

Combine like terms: 9y + -9y = 0
225 + -9y = 144 + 0
225 + -9y = 144

Add '-225' to each side of the equation.
225 + -225 + -9y = 144 + -225

Combine like terms: 225 + -225 = 0
0 + -9y = 144 + -225
-9y = 144 + -225

Combine like terms: 144 + -225 = -81
-9y = -81

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

Simplifying
y = 9

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