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Ray Of Light [21]
3 years ago
12

2x+8y=74 3x - 4y = 43

SAT
2 answers:
sesenic [268]3 years ago
7 0

Answer:

y=17/7

x=123/7

Explanation:

2x=74-8y

x=(74-8y)/2

x=2(37-8y)/2

x=37-8y

3(37-8y)-4y=43

111-24y-4y=43

111-43=24y+4y

68=28y

y=68/28

y=17/7

x=37-8(17/7)

x=37-136/7=(37*7-136)/7=(259-136)/7

x=123/7

max2010maxim [7]3 years ago
5 0
(2x+8y)/2=74/2

x+4y=37

x=37-4y

3(37-4y)- 4y=43

117- 12y- 4y =43

-16y= 74

y=4.625

x=37- 4(4.625)

x= 37- 18.5

x= 55.5

so y=4.625,x=55.5
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