a-15=3(a+1)+2

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Solution for a-15=3(a+1)+2 equation:


Simplifying
a + -15 = 3(a + 1) + 2

Reorder the terms:
-15 + a = 3(a + 1) + 2

Reorder the terms:
-15 + a = 3(1 + a) + 2
-15 + a = (1 * 3 + a * 3) + 2
-15 + a = (3 + 3a) + 2

Reorder the terms:
-15 + a = 3 + 2 + 3a

Combine like terms: 3 + 2 = 5
-15 + a = 5 + 3a

Solving
-15 + a = 5 + 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 + a + -3a = 5 + 3a + -3a

Combine like terms: a + -3a = -2a
-15 + -2a = 5 + 3a + -3a

Combine like terms: 3a + -3a = 0
-15 + -2a = 5 + 0
-15 + -2a = 5

Add '15' to each side of the equation.
-15 + 15 + -2a = 5 + 15

Combine like terms: -15 + 15 = 0
0 + -2a = 5 + 15
-2a = 5 + 15

Combine like terms: 5 + 15 = 20
-2a = 20

Divide each side by '-2'.
a = -10

Simplifying
a = -10

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