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sveta [45]
3 years ago
12

What is -7/12 + 3/8?

Mathematics
2 answers:
inna [77]3 years ago
7 0

Answer:

-\frac{5}{24}

Step-by-step explanation:

zhannawk [14.2K]3 years ago
4 0

Answer:

\frac{-5}{24}

Step-by-step explanation:

let's use a common denominator! the easiest way is to multiply each side's numerator and denominator by the other's denominator. let's do this problem!

\frac{-7(8)}{12(8)} ----> \frac{-56}{96}

\frac{3(12)}{8(12)}-----> \frac{36}{96}

now that we have similar denominators, we can add the two numerators together!

-56 + 36 = -20!

\frac{-20}{96}

but wait! we can simplify it by dividing by 5 on both the numerator and denominator,

\frac{-5}{24}

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Answer:

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Step-by-step explanation:

We arbitrarily set out to eliminate x and then find y.

Keep 4x-3y=18 as is, but multiply 2x+y=4 by -2.  We get -4x - 2y = -8.

Combine:

4x - 3y = 18

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Solving for y, we get y = 2.  

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