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

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.

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)

~Loliii is Waifu

$320 to $405

step by step explanation:

in one day he earns between $64 and $81

therefore if he works for 5 days, he will earn between 64 x 5 to 81 x 5

= $320 to $405