Answer: The mechanic worked 3hrs 95 minutes
Step-by-step explanation:
The lowest common denominator of 1/3 and 2/9 = 9
Hey there!
First, multiply the second equation by -2 as the problem states. When you multiply the second equation by -2, you get:
-2x+4y=2
Now, add this equation to the first equation in which you simply combine like terms:
2x+y=3
+
-2x+4y=2
=
5y= 5
In conclusion, the correct answer would be the first choice.
