4x + y = 4
2x + 7y = 28

4x + y = 4
−2x − 7y = 28
4x + y = 4
−8x − 28y = 112
−28x − 7y = −28
2x + 7y = 28
−8x − 2y = 8
2x + 7y = 28

Question

4x + y = 4
2x + 7y = 28

4x + y = 4
−2x − 7y = 28
 4x + y = 4
−8x − 28y = 112
 −28x − 7y = −28
2x + 7y = 28
 −8x − 2y = 8
2x + 7y = 28

XTHb · Answer

what are we solving here

sxdsouls · Answer

whats the equation i can help ? or is it all of them ?

jhonyy9 · Answer

do you need solving this system ? using what method elimination or substitution ?

Mercury · Answer

judging by the original function + answer choices, it is most likely asking which one is a valid step

remember, when solving systems of equations, you can multiply any equation in the system by some constant. (remember to multiply both sides, or the equation won't be valid anymore)

so, looking at your answer choices, which choice follows this idea?