2(9-2y)=42

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Solution for 2(9-2y)=42 equation: 


Simplifying
2(9 + -2y) = 42
(9 * 2 + -2y * 2) = 42
(18 + -4y) = 42

Solving
18 + -4y = 42

Solving for variable 'y'.

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

Add '-18' to each side of the equation.
18 + -18 + -4y = 42 + -18

Combine like terms: 18 + -18 = 0
0 + -4y = 42 + -18
-4y = 42 + -18

Combine like terms: 42 + -18 = 24
-4y = 24

Divide each side by '-4'.
y = -6

Simplifying
y = -6

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