2(1-a)=-(a+7)

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Solution for 2(1-a)=-(a+7) equation:


Simplifying
2(1 + -1a) = -1(a + 7)
(1 * 2 + -1a * 2) = -1(a + 7)
(2 + -2a) = -1(a + 7)

Reorder the terms:
2 + -2a = -1(7 + a)
2 + -2a = (7 * -1 + a * -1)
2 + -2a = (-7 + -1a)

Solving
2 + -2a = -7 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
2 + -2a + a = -7 + -1a + a

Combine like terms: -2a + a = -1a
2 + -1a = -7 + -1a + a

Combine like terms: -1a + a = 0
2 + -1a = -7 + 0
2 + -1a = -7

Add '-2' to each side of the equation.
2 + -2 + -1a = -7 + -2

Combine like terms: 2 + -2 = 0
0 + -1a = -7 + -2
-1a = -7 + -2

Combine like terms: -7 + -2 = -9
-1a = -9

Divide each side by '-1'.
a = 9

Simplifying
a = 9

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