2a+2(3a+2)-(3a-9-3)=9

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Solution for 2a+2(3a+2)-(3a-9-3)=9 equation:


Simplifying
2a + 2(3a + 2) + -1(3a + -9 + -3) = 9

Reorder the terms:
2a + 2(2 + 3a) + -1(3a + -9 + -3) = 9
2a + (2 * 2 + 3a * 2) + -1(3a + -9 + -3) = 9
2a + (4 + 6a) + -1(3a + -9 + -3) = 9

Reorder the terms:
2a + 4 + 6a + -1(-9 + -3 + 3a) = 9

Combine like terms: -9 + -3 = -12
2a + 4 + 6a + -1(-12 + 3a) = 9
2a + 4 + 6a + (-12 * -1 + 3a * -1) = 9
2a + 4 + 6a + (12 + -3a) = 9

Reorder the terms:
4 + 12 + 2a + 6a + -3a = 9

Combine like terms: 4 + 12 = 16
16 + 2a + 6a + -3a = 9

Combine like terms: 2a + 6a = 8a
16 + 8a + -3a = 9

Combine like terms: 8a + -3a = 5a
16 + 5a = 9

Solving
16 + 5a = 9

Solving for variable 'a'.

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

Add '-16' to each side of the equation.
16 + -16 + 5a = 9 + -16

Combine like terms: 16 + -16 = 0
0 + 5a = 9 + -16
5a = 9 + -16

Combine like terms: 9 + -16 = -7
5a = -7

Divide each side by '5'.
a = -1.4

Simplifying
a = -1.4

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