9y-4(4+5)=40

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Solution for 9y-4(4+5)=40 equation: 


Simplifying
9y + -4(4 + 5) = 40

Combine like terms: 4 + 5 = 9
9y + -4(9) = 40

Multiply -4 * 9
9y + -36 = 40

Reorder the terms:
-36 + 9y = 40

Solving
-36 + 9y = 40

Solving for variable 'y'.

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

Add '36' to each side of the equation.
-36 + 36 + 9y = 40 + 36

Combine like terms: -36 + 36 = 0
0 + 9y = 40 + 36
9y = 40 + 36

Combine like terms: 40 + 36 = 76
9y = 76

Divide each side by '9'.
y = 8.444444444

Simplifying
y = 8.444444444

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