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Mathematics 21 Online
OpenStudy (danielbarriosr1):

What is the value of x in the equation below?

OpenStudy (danielbarriosr1):

\[\frac{ 13 }{ x } =\frac{ 20 }{ 3 }\]

OpenStudy (anonymous):

This is a proportion question. Multiply the 13 with 3 and the 20 with x 39 = 20x Does that make sense so far?

OpenStudy (anonymous):

Cross multiply? \[\dfrac{ 13 }{ x } =\frac{ 20 }{ 3 } \implies 20 \times x = 13 \times 3\] 2x = 39 Solve for x:

OpenStudy (anonymous):

You will then divide each side by 20 39/20 = x

OpenStudy (danielbarriosr1):

yes

OpenStudy (anonymous):

*20x = 39

OpenStudy (danielbarriosr1):

thanks

OpenStudy (anonymous):

x = 1.95

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