Solve the system of equations using substitution. 4x-y=7 3y-12x=-21

asked Oct 20, 2019 76.0k views

5 votes

Solve the system of equations using substitution.

4x-y=7 3y-12x=-21

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2 votes

y=4x-7

3(4x-7)-12x=-21
12x-21-12x=-21
-21=-21

so it is all real numbers

Simon Watkins answered Oct 20, 2019

5.8k points

4 votes

Answer:

Infinite solution

Explanation:

Geoff Goodman answered Oct 24, 2019

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