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Mathematics 19 Online
OpenStudy (anonymous):

HELP ALGEBRA 2

OpenStudy (anonymous):

hero (hero):

The question is simply asking which pair of equations have the same value of x.

OpenStudy (anonymous):

THE first problem is X=15 the second problem is x=15

hero (hero):

And to provide the steps to each solution

OpenStudy (anonymous):

and i don't know how to solve the third one

OpenStudy (anonymous):

i mean the second one is x=16

OpenStudy (anonymous):

but

OpenStudy (anonymous):

do you know how to solve the third one?

hero (hero):

Do you know what cross multiplication is?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

is that what I have to do? can you show me how? because I don't know how to cross multiply with this fraction

OpenStudy (anonymous):

find the value of x from second and plug in (1) and (3) and see if it satisfies the equations.

hero (hero):

When you cross muliply, you take something like \[\frac{a}{b} = \frac{c}{d}\] And then multiply the denominators into the numerators so that \[ab = bc\] In this case, you take \[\frac{2x + 1}{3} = \frac{x + 6}{2}\] and cross multiply so that: 2(2x + 1) = 3(x + 6) Can you solve for x from here?

hero (hero):

\[ad = bc^{*}\]

OpenStudy (anonymous):

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