5.5x + 3 = y
7x =y
5.5x + 3 = 7x (-5.5x both sides)
3 = 1.5x (÷1.5 both sides)
X = 2
Michael takes two hours
1)
2x-y=16
-2y-x=-8
You need to solve on of the equations for x or y. I will solve the first equation for y.
2x-y=16
-y=-2x+16
y=+2x-16
Then you can substitute that y value for the y value in the second equation (2y-x=-8) can be written as 2(2x-16)-x=-8 since y=2x-16.
then you solve for x.
4x-32-x=-8
3x=24
x=8
therefore y=0 since 2(0)-8=-8
I will complete the second part of the question either in the comments or a new answer later when I have more time.
Answer:
x = 47, y = 133
Step-by-step explanation:
Since the lines are parallel, then
x = 47 ( alternate angles )
x and y are adjacent angles and supplementary, thus
y = 180 - x = 180 - 47 = 133
The answer is a because if you add 7:30 with 2h 55min you will get 9:55