-30+7a=3(7+8a)

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Solution for -30+7a=3(7+8a) equation:


Simplifying
-30 + 7a = 3(7 + 8a)
-30 + 7a = (7 * 3 + 8a * 3)
-30 + 7a = (21 + 24a)

Solving
-30 + 7a = 21 + 24a

Solving for variable 'a'.

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

Add '-24a' to each side of the equation.
-30 + 7a + -24a = 21 + 24a + -24a

Combine like terms: 7a + -24a = -17a
-30 + -17a = 21 + 24a + -24a

Combine like terms: 24a + -24a = 0
-30 + -17a = 21 + 0
-30 + -17a = 21

Add '30' to each side of the equation.
-30 + 30 + -17a = 21 + 30

Combine like terms: -30 + 30 = 0
0 + -17a = 21 + 30
-17a = 21 + 30

Combine like terms: 21 + 30 = 51
-17a = 51

Divide each side by '-17'.
a = -3

Simplifying
a = -3

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