contestada

Given the following system, what would be the best way to start slowing the system?
3x-y=-5
-4x+5y=58
A) Solve for y in the first equation, and substitute the solution for y in the second equation.
B) Solve for x in the second equation, and substitute the solution for x in the first equation.
C) Solve for y in the second equation, and substitute the solution for y in the first equation.
D) Solve for x in the first equation, and substitute the solution for x in the second equation.

Respuesta :

A would be the correct answer because the y variable only has a coefficient of 1. So we would solve for y, which would get us y=3x+5, then we would substitute the value in the second equation which would look like -4x+5(3x+5)=58. Hope this helpss. :)