C. 4x + y = 21
4(3) + 9 = 21
12 + 9 = 21
21 = 21
Answer:
1) Subtracting one from the other
2) x = 0.375 and y = 0.125
Step-by-step explanation:
Equation 1 :

Equation 2:

To solve these equations by the Elimination method we multiply equation 1 with 6 and multiply equation 2 with 2 so now,

Now for the second equation:

Now subtracting equation 2 from equation 1

now insert this value of y into any equation
lets insert it into equation 1

Answer:
12:18 and 20:30
Step-by-step explanation: