12-3*(a-15)=10+5*(5-a)

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Solution for 12-3*(a-15)=10+5*(5-a) equation:


Simplifying
12 + -3(a + -15) = 10 + 5(5 + -1a)

Reorder the terms:
12 + -3(-15 + a) = 10 + 5(5 + -1a)
12 + (-15 * -3 + a * -3) = 10 + 5(5 + -1a)
12 + (45 + -3a) = 10 + 5(5 + -1a)

Combine like terms: 12 + 45 = 57
57 + -3a = 10 + 5(5 + -1a)
57 + -3a = 10 + (5 * 5 + -1a * 5)
57 + -3a = 10 + (25 + -5a)

Combine like terms: 10 + 25 = 35
57 + -3a = 35 + -5a

Solving
57 + -3a = 35 + -5a

Solving for variable 'a'.

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

Add '5a' to each side of the equation.
57 + -3a + 5a = 35 + -5a + 5a

Combine like terms: -3a + 5a = 2a
57 + 2a = 35 + -5a + 5a

Combine like terms: -5a + 5a = 0
57 + 2a = 35 + 0
57 + 2a = 35

Add '-57' to each side of the equation.
57 + -57 + 2a = 35 + -57

Combine like terms: 57 + -57 = 0
0 + 2a = 35 + -57
2a = 35 + -57

Combine like terms: 35 + -57 = -22
2a = -22

Divide each side by '2'.
a = -11

Simplifying
a = -11

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