6a-15=-3(a-7)

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Solution for 6a-15=-3(a-7) equation:


Simplifying
6a + -15 = -3(a + -7)

Reorder the terms:
-15 + 6a = -3(a + -7)

Reorder the terms:
-15 + 6a = -3(-7 + a)
-15 + 6a = (-7 * -3 + a * -3)
-15 + 6a = (21 + -3a)

Solving
-15 + 6a = 21 + -3a

Solving for variable 'a'.

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

Add '3a' to each side of the equation.
-15 + 6a + 3a = 21 + -3a + 3a

Combine like terms: 6a + 3a = 9a
-15 + 9a = 21 + -3a + 3a

Combine like terms: -3a + 3a = 0
-15 + 9a = 21 + 0
-15 + 9a = 21

Add '15' to each side of the equation.
-15 + 15 + 9a = 21 + 15

Combine like terms: -15 + 15 = 0
0 + 9a = 21 + 15
9a = 21 + 15

Combine like terms: 21 + 15 = 36
9a = 36

Divide each side by '9'.
a = 4

Simplifying
a = 4

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