Answer:
domt know which one but this may help
Step-by-step explanation:
when you take 38707 into consideration the 3 would be 30,000 the 8 would be 8,000 and the 7 would be 70
-x+y=4 add x to both sides to get y=x+4
Plug x+4 into the equation for y to get 3x-2(x+4)=-7
Distribute to get 3x-2x-8=-7
Add 8 to both sides to get 3x-2x=1
Subtract 3x-2x to get x=1
the answer is 1