(15a-9)-(10a+3)=

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Solution for (15a-9)-(10a+3)= equation:


Simplifying
(15a + -9) + -1(10a + 3) = 0

Reorder the terms:
(-9 + 15a) + -1(10a + 3) = 0

Remove parenthesis around (-9 + 15a)
-9 + 15a + -1(10a + 3) = 0

Reorder the terms:
-9 + 15a + -1(3 + 10a) = 0
-9 + 15a + (3 * -1 + 10a * -1) = 0
-9 + 15a + (-3 + -10a) = 0

Reorder the terms:
-9 + -3 + 15a + -10a = 0

Combine like terms: -9 + -3 = -12
-12 + 15a + -10a = 0

Combine like terms: 15a + -10a = 5a
-12 + 5a = 0

Solving
-12 + 5a = 0

Solving for variable 'a'.

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

Add '12' to each side of the equation.
-12 + 12 + 5a = 0 + 12

Combine like terms: -12 + 12 = 0
0 + 5a = 0 + 12
5a = 0 + 12

Combine like terms: 0 + 12 = 12
5a = 12

Divide each side by '5'.
a = 2.4

Simplifying
a = 2.4

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