Answer:
Based off of the problem, the answer would most likely be A.
Step-by-step explanation:
Use one of those random apps search the question up and the first link should tell you I guess it depends
If you have to unknown variables, you have to eliminate one, e.g. Like this:
2×(2y-10)+3y=1240. Now there is only one unknown variable
4y-20+3y=1240
7y-20=1240
7y=1260
y=1260/7=180
Now you can calculate x
x=2y-10=2×180-10=360-10=350. ( You can also use the other equation but This one is easier)
Answer:
84.32
therefore the answer is A
Answer:

» substitute y in eqn(a) with y in eqn(b)

» Find y in eqn(b)
