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

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Solution for 5(a-4)=4(a+7)+9a equation:


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

Reorder the terms:
5(-4 + a) = 4(a + 7) + 9a
(-4 * 5 + a * 5) = 4(a + 7) + 9a
(-20 + 5a) = 4(a + 7) + 9a

Reorder the terms:
-20 + 5a = 4(7 + a) + 9a
-20 + 5a = (7 * 4 + a * 4) + 9a
-20 + 5a = (28 + 4a) + 9a

Combine like terms: 4a + 9a = 13a
-20 + 5a = 28 + 13a

Solving
-20 + 5a = 28 + 13a

Solving for variable 'a'.

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

Add '-13a' to each side of the equation.
-20 + 5a + -13a = 28 + 13a + -13a

Combine like terms: 5a + -13a = -8a
-20 + -8a = 28 + 13a + -13a

Combine like terms: 13a + -13a = 0
-20 + -8a = 28 + 0
-20 + -8a = 28

Add '20' to each side of the equation.
-20 + 20 + -8a = 28 + 20

Combine like terms: -20 + 20 = 0
0 + -8a = 28 + 20
-8a = 28 + 20

Combine like terms: 28 + 20 = 48
-8a = 48

Divide each side by '-8'.
a = -6

Simplifying
a = -6

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