3a+7+2a=18-9

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Solution for 3a+7+2a=18-9 equation:


Simplifying
3a + 7 + 2a = 18 + -9

Reorder the terms:
7 + 3a + 2a = 18 + -9

Combine like terms: 3a + 2a = 5a
7 + 5a = 18 + -9

Combine like terms: 18 + -9 = 9
7 + 5a = 9

Solving
7 + 5a = 9

Solving for variable 'a'.

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

Add '-7' to each side of the equation.
7 + -7 + 5a = 9 + -7

Combine like terms: 7 + -7 = 0
0 + 5a = 9 + -7
5a = 9 + -7

Combine like terms: 9 + -7 = 2
5a = 2

Divide each side by '5'.
a = 0.4

Simplifying
a = 0.4

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