Question

Solve the system of equations using substitution.

4x - y = 7
3y – 12x = -21
(3,5)
(6, 17)
no solution
infinite solutions

Answer 1

Answer: infinite solutions. Just took the quiz

Explanation:

Answer 2

Infinite amount of solutions

Explanation:

Step 1: Write systems of equations

4x - y = 7

3y - 12x = -21

Step 2: Rewrite

-y = 7 - 4x

y = 4x - 7

Step 3: Solve for x

1. Substitute in y into second equation: 3(4x - 7) - 12x = -21
2. Distribute 3: 12x - 21 - 12x = -21
3. Combine like terms: -21 = -21

Here we see that we would have infinite amount of solutions.