3a+7=2-a

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Solution for 3a+7=2-a equation:


Simplifying
3a + 7 = 2 + -1a

Reorder the terms:
7 + 3a = 2 + -1a

Solving
7 + 3a = 2 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
7 + 3a + a = 2 + -1a + a

Combine like terms: 3a + a = 4a
7 + 4a = 2 + -1a + a

Combine like terms: -1a + a = 0
7 + 4a = 2 + 0
7 + 4a = 2

Add '-7' to each side of the equation.
7 + -7 + 4a = 2 + -7

Combine like terms: 7 + -7 = 0
0 + 4a = 2 + -7
4a = 2 + -7

Combine like terms: 2 + -7 = -5
4a = -5

Divide each side by '4'.
a = -1.25

Simplifying
a = -1.25

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