-3a+5(8a+4)=8a-9

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Solution for -3a+5(8a+4)=8a-9 equation:


Simplifying
-3a + 5(8a + 4) = 8a + -9

Reorder the terms:
-3a + 5(4 + 8a) = 8a + -9
-3a + (4 * 5 + 8a * 5) = 8a + -9
-3a + (20 + 40a) = 8a + -9

Reorder the terms:
20 + -3a + 40a = 8a + -9

Combine like terms: -3a + 40a = 37a
20 + 37a = 8a + -9

Reorder the terms:
20 + 37a = -9 + 8a

Solving
20 + 37a = -9 + 8a

Solving for variable 'a'.

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

Add '-8a' to each side of the equation.
20 + 37a + -8a = -9 + 8a + -8a

Combine like terms: 37a + -8a = 29a
20 + 29a = -9 + 8a + -8a

Combine like terms: 8a + -8a = 0
20 + 29a = -9 + 0
20 + 29a = -9

Add '-20' to each side of the equation.
20 + -20 + 29a = -9 + -20

Combine like terms: 20 + -20 = 0
0 + 29a = -9 + -20
29a = -9 + -20

Combine like terms: -9 + -20 = -29
29a = -29

Divide each side by '29'.
a = -1

Simplifying
a = -1

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