Answer:
The solution is (4, 0)
Step-by-step explanation:
Using Linear combination method to solve:

Since "e" have the same coefficient in both equation with opposite operator; we will add.

Divide both side by coefficient of d which is 3

Since d = 4; put 'd' into any of the equation to get 'e'

Therefore, the solution is (4, 0)
25 minutes (0:25) added to 7:15.
7:15 + 0:25 = 7:40
Also expressible as 15+25
He arrived at 7:40AM.
Answer:
x=35
Step-by-step explanation:
3x+7+68=180
3x+75=180
3x=105
x=35
C. 4x + y = 21
4(3) + 9 = 21
12 + 9 = 21
21 = 21