7-4(a+2)=9+a

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Solution for 7-4(a+2)=9+a equation:


Simplifying
7 + -4(a + 2) = 9 + a

Reorder the terms:
7 + -4(2 + a) = 9 + a
7 + (2 * -4 + a * -4) = 9 + a
7 + (-8 + -4a) = 9 + a

Combine like terms: 7 + -8 = -1
-1 + -4a = 9 + a

Solving
-1 + -4a = 9 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-1 + -4a + -1a = 9 + a + -1a

Combine like terms: -4a + -1a = -5a
-1 + -5a = 9 + a + -1a

Combine like terms: a + -1a = 0
-1 + -5a = 9 + 0
-1 + -5a = 9

Add '1' to each side of the equation.
-1 + 1 + -5a = 9 + 1

Combine like terms: -1 + 1 = 0
0 + -5a = 9 + 1
-5a = 9 + 1

Combine like terms: 9 + 1 = 10
-5a = 10

Divide each side by '-5'.
a = -2

Simplifying
a = -2

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