What is the value of x in the proportion x + 1 / x+3 = 15/ 21 a.4 b.1/3 c.1/4 d.3

asked Apr 17, 2017 29.2k views

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What is the value of x in the proportion x + 1 / x+3 = 15/ 21

a.4
b.1/3
c.1/4
d.3

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3 votes

×+1/×+3=15/21
×+1=15(×+3)/21
×+1=15×+45/21
21(×+1)=15×+45
21×+21=15×+45
21×-15×=45-21
6×=24
×=4

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2 votes

What is the value of x in the proportion x + 1 / x+3 = 15/ 21
a.4
b.1/3
c.1/4
d.3
the answer is
a.) 4

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