Answer:
7 + 6x
Step-by-step explanation:
12 + 3(2x - 3) + 4 =
12 + 6x - 9 + 4 =
7 + 6x
Move all the x terms to one side and solve for x. 15x-10x=21-6 : 5x/5=15/5 : x=3
5+4=9 9-2=7
7x(-2)= (-14)
your answer is -14
<u>Answer:</u>
$50 and $115
<u>Step-by-step explanation:</u>
We know that,
the sum of the two rates = $165 per hour
Let x and (165 - x) represent the $/hour of the 15hr and 5hr mechanics respectively.
Then combining their charges together to get:

Solving for x to get:



So the rate charged per hour by one mechanic is $50 and for the other mechanic =
$115.
You just add both of the powers , so 6-3 is 3
the answer is 5^3