Question

What is the solution to the system of equations? Use the substitution method.

y-3x=7
21+9x=3y
A. There is no solution
B. There are an infinite number solutions
C. The solution is {1,10}
D. The solution is {28,0}

Answer 1

Hello,

Answer B

y-3x=7==>y=3x+7
3y=9x+21==>y=3x+7
==>3x+7=3x+7
==>0x=0