Answer:
5:12
Step-by-step explanation:
Game
Using these variables, we can set up equations.
3x + 5y = 42
9x + 7y = 72
We have here a system of equations, where we have two or more equations with two or more different variables. We use the elimination method to solve for the variables.
Multiply eq1 by 3. Keep eq2.
9x + 15y = 126 eq1
9x + 7y = 72 eq2
Subtract eq2 from eq1 to eliminate the x terms.
8y = 54
y = 6.75
Answer:
x = 4
Step-by-step explanation:

Step 1: Collect like terms and simplify

Step 2: Divide both sides of the equation by 3

Simplify

Answer:
its the first one
Step-by-step explanation: