6a-3a=9-2(2a+5)

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Solution for 6a-3a=9-2(2a+5) equation:


Simplifying
6a + -3a = 9 + -2(2a + 5)

Combine like terms: 6a + -3a = 3a
3a = 9 + -2(2a + 5)

Reorder the terms:
3a = 9 + -2(5 + 2a)
3a = 9 + (5 * -2 + 2a * -2)
3a = 9 + (-10 + -4a)

Combine like terms: 9 + -10 = -1
3a = -1 + -4a

Solving
3a = -1 + -4a

Solving for variable 'a'.

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

Add '4a' to each side of the equation.
3a + 4a = -1 + -4a + 4a

Combine like terms: 3a + 4a = 7a
7a = -1 + -4a + 4a

Combine like terms: -4a + 4a = 0
7a = -1 + 0
7a = -1

Divide each side by '7'.
a = -0.1428571429

Simplifying
a = -0.1428571429

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