12-1.5=3a

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Solution for 12-1.5=3a equation:


Simplifying
12 + -1.5 = 3a

Combine like terms: 12 + -1.5 = 10.5
10.5 = 3a

Solving
10.5 = 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.
10.5 + -3a = 3a + -3a

Combine like terms: 3a + -3a = 0
10.5 + -3a = 0

Add '-10.5' to each side of the equation.
10.5 + -10.5 + -3a = 0 + -10.5

Combine like terms: 10.5 + -10.5 = 0.0
0.0 + -3a = 0 + -10.5
-3a = 0 + -10.5

Combine like terms: 0 + -10.5 = -10.5
-3a = -10.5

Divide each side by '-3'.
a = 3.5

Simplifying
a = 3.5

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