10y-3y-9=40

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Solution for 10y-3y-9=40 equation: 


Simplifying
10y + -3y + -9 = 40

Reorder the terms:
-9 + 10y + -3y = 40

Combine like terms: 10y + -3y = 7y
-9 + 7y = 40

Solving
-9 + 7y = 40

Solving for variable 'y'.

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

Add '9' to each side of the equation.
-9 + 9 + 7y = 40 + 9

Combine like terms: -9 + 9 = 0
0 + 7y = 40 + 9
7y = 40 + 9

Combine like terms: 40 + 9 = 49
7y = 49

Divide each side by '7'.
y = 7

Simplifying
y = 7

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