-2(-2)-9y=18

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Solution for -2(-2)-9y=18 equation: 


Simplifying
-2(-2) + -9y = 18

Multiply -2 * -2
4 + -9y = 18

Solving
4 + -9y = 18

Solving for variable 'y'.

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

Add '-4' to each side of the equation.
4 + -4 + -9y = 18 + -4

Combine like terms: 4 + -4 = 0
0 + -9y = 18 + -4
-9y = 18 + -4

Combine like terms: 18 + -4 = 14
-9y = 14

Divide each side by '-9'.
y = -1.555555556

Simplifying
y = -1.555555556

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