4y-(y-a)=-20

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Solution for 4y-(y-a)=-20 equation:


Simplifying
4y + -1(y + -1a) = -20

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

Reorder the terms:
1a + 4y + -1y = -20

Combine like terms: 4y + -1y = 3y
1a + 3y = -20

Solving
1a + 3y = -20

Solving for variable 'a'.

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

Add '-3y' to each side of the equation.
1a + 3y + -3y = -20 + -3y

Combine like terms: 3y + -3y = 0
1a + 0 = -20 + -3y
1a = -20 + -3y

Divide each side by '1'.
a = -20 + -3y

Simplifying
a = -20 + -3y

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