X+3y=7
x-3y=1
add them together
x+3y=7
<u>x-3y=1 +
</u>2x+0y=8
2x=8
divide 2
x=4
subsitute
x+3y=7
4+3y=7
subtract 4
3y=3
divid 3
y=1
x=4
y=1
answer is A
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Answer:
1.5, 20, 40, 7.5
Step-by-step explanation:
The first one is 1.5, the second one is 20, the third is 40, and the fourth is 7.5
Answer:
320
Step-by-step explanation:
2 out of 5 is the ratio 2/5.
We want the denominator to become 800.



Since 2/5 = 320/800, he will need to prepare 320 cups of soup.