20-a=2a-(6a+1)

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Solution for 20-a=2a-(6a+1) equation:


Simplifying
20 + -1a = 2a + -1(6a + 1)

Reorder the terms:
20 + -1a = 2a + -1(1 + 6a)
20 + -1a = 2a + (1 * -1 + 6a * -1)
20 + -1a = 2a + (-1 + -6a)

Reorder the terms:
20 + -1a = -1 + 2a + -6a

Combine like terms: 2a + -6a = -4a
20 + -1a = -1 + -4a

Solving
20 + -1a = -1 + -4a

Solving for variable 'a'.

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

Add '4a' to each side of the equation.
20 + -1a + 4a = -1 + -4a + 4a

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

Combine like terms: -4a + 4a = 0
20 + 3a = -1 + 0
20 + 3a = -1

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

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

Combine like terms: -1 + -20 = -21
3a = -21

Divide each side by '3'.
a = -7

Simplifying
a = -7

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