a+20+3a=-12-3a-17

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Solution for a+20+3a=-12-3a-17 equation:


Simplifying
a + 20 + 3a = -12 + -3a + -17

Reorder the terms:
20 + a + 3a = -12 + -3a + -17

Combine like terms: a + 3a = 4a
20 + 4a = -12 + -3a + -17

Reorder the terms:
20 + 4a = -12 + -17 + -3a

Combine like terms: -12 + -17 = -29
20 + 4a = -29 + -3a

Solving
20 + 4a = -29 + -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.
20 + 4a + 3a = -29 + -3a + 3a

Combine like terms: 4a + 3a = 7a
20 + 7a = -29 + -3a + 3a

Combine like terms: -3a + 3a = 0
20 + 7a = -29 + 0
20 + 7a = -29

Add '-20' to each side of the equation.
20 + -20 + 7a = -29 + -20

Combine like terms: 20 + -20 = 0
0 + 7a = -29 + -20
7a = -29 + -20

Combine like terms: -29 + -20 = -49
7a = -49

Divide each side by '7'.
a = -7

Simplifying
a = -7

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