Question

What is a in the problem 12+1.5a=3a

Answer 1

Move terms

12+1.5a=3a

Collect the like terms

1.5a3a=-12

Divide both sides by -1.5

-1.5a=-12

a=8

Answer 2

Isolate the a. Note the equal sign, what you do to one side, you do to the other.

First, subtract 1.5a from both sides

12 + 1.5a (-1.5a) = 3a (-1.5a)

12 = 3a - 1.5a

12 = 1.5a

Isolate the a. Divide 1.5 from both sides

(12)/1.5 = (1.5a)/1.5

a = 12/1.5

a = 8

8 is your answer for a.

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Check: Plug in 8 for a.

12 + 1.5(8) = 3(8)

Simplify. Remember to follow PEMDAS.

12 + 1.5(8) = 24

12 + 12 = 24

24 = 24 (True)

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~Loliii is Waifu