deb64
10.02.2021 •
Mathematics
A system of equations is shown below.
Equation A: 5x + 9y = 12
Equation B: 4x -
3y=8
Which method eliminates one of the variables?
(1) Multiply equation A by - and add the result to equation B.
(2) Multiply equation B by 3 and add the result to equation A.
(3) Multiply equation A by 2 and equation B by - 6 and add the results
together
(4) Multiply equation B by 5 and equation A by 4 and add the results
together.
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Ответ:
11
Step-by-step explanation:
We need 60 dollars, we have 16
60-16 = 44
We need to earn 44 more dollars
At 4 dollars a pound
The money earned = lbs * dollars per pound
44 = lbs *4
Divide each side by 4
44/4 = lbs
11 = lbs
We must sell 11 more lbs