Answer D because you want to get the x by itself and in order to do this she needs to multiply by -4 so that one side only has x.
Looks like 10 and and a half if it's four it's 10 and a half if it 6 it's 12 and a half
Answer:
It appears to be substitution
Step-by-step explanation:
I think you are talking about system of equations
282
Step-by-step explanation:
C=180-112=68
A=180-68-51=61
sum of exterior angles=112+119+51=282
