30-6a=-3(5+7a)

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Solution for 30-6a=-3(5+7a) equation:


Simplifying
30 + -6a = -3(5 + 7a)
30 + -6a = (5 * -3 + 7a * -3)
30 + -6a = (-15 + -21a)

Solving
30 + -6a = -15 + -21a

Solving for variable 'a'.

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

Add '21a' to each side of the equation.
30 + -6a + 21a = -15 + -21a + 21a

Combine like terms: -6a + 21a = 15a
30 + 15a = -15 + -21a + 21a

Combine like terms: -21a + 21a = 0
30 + 15a = -15 + 0
30 + 15a = -15

Add '-30' to each side of the equation.
30 + -30 + 15a = -15 + -30

Combine like terms: 30 + -30 = 0
0 + 15a = -15 + -30
15a = -15 + -30

Combine like terms: -15 + -30 = -45
15a = -45

Divide each side by '15'.
a = -3

Simplifying
a = -3

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