Question

Andre and Elena are solving this system of equations.

Y=3x
Y=9x-30
Andre’s first step is to create a new system:
3y=9x
Y=9x-30
Do you agree with either first step?

A-both strategies work
B-only the first strategy works
C-only the second strategy works
D-neither strategies work.

Answer 1

A-both works

Explanation:

one can simply sub into the second equation from the first step's one and remove an unknown, making it easy to solve