3a+5(2a+6)-7a=

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Solution for 3a+5(2a+6)-7a= equation:


Simplifying
3a + 5(2a + 6) + -7a = 0

Reorder the terms:
3a + 5(6 + 2a) + -7a = 0
3a + (6 * 5 + 2a * 5) + -7a = 0
3a + (30 + 10a) + -7a = 0

Reorder the terms:
30 + 3a + 10a + -7a = 0

Combine like terms: 3a + 10a = 13a
30 + 13a + -7a = 0

Combine like terms: 13a + -7a = 6a
30 + 6a = 0

Solving
30 + 6a = 0

Solving for variable 'a'.

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

Add '-30' to each side of the equation.
30 + -30 + 6a = 0 + -30

Combine like terms: 30 + -30 = 0
0 + 6a = 0 + -30
6a = 0 + -30

Combine like terms: 0 + -30 = -30
6a = -30

Divide each side by '6'.
a = -5

Simplifying
a = -5

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