2(-2y-1)=-20

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Solution for 2(-2y-1)=-20 equation:


Simplifying
2(-2y + -1) = -20

Reorder the terms:
2(-1 + -2y) = -20
(-1 * 2 + -2y * 2) = -20
(-2 + -4y) = -20

Solving
-2 + -4y = -20

Solving for variable 'y'.

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

Add '2' to each side of the equation.
-2 + 2 + -4y = -20 + 2

Combine like terms: -2 + 2 = 0
0 + -4y = -20 + 2
-4y = -20 + 2

Combine like terms: -20 + 2 = -18
-4y = -18

Divide each side by '-4'.
y = 4.5

Simplifying
y = 4.5

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