10a+15=7a-30

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Solution for 10a+15=7a-30 equation:


Simplifying
10a + 15 = 7a + -30

Reorder the terms:
15 + 10a = 7a + -30

Reorder the terms:
15 + 10a = -30 + 7a

Solving
15 + 10a = -30 + 7a

Solving for variable 'a'.

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

Add '-7a' to each side of the equation.
15 + 10a + -7a = -30 + 7a + -7a

Combine like terms: 10a + -7a = 3a
15 + 3a = -30 + 7a + -7a

Combine like terms: 7a + -7a = 0
15 + 3a = -30 + 0
15 + 3a = -30

Add '-15' to each side of the equation.
15 + -15 + 3a = -30 + -15

Combine like terms: 15 + -15 = 0
0 + 3a = -30 + -15
3a = -30 + -15

Combine like terms: -30 + -15 = -45
3a = -45

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

Simplifying
a = -15

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