2 years ago

-1/3/4 + 1/1/6 equals what in fractions

Mathematics

1 answer:

Gnesinka [82]2 years ago

8 0

Step-by-step explanation:

Simplify fractions on fractions

$\frac{1}{ \frac{3}{4} }$

Multiply by the inverse of denominator

$\frac{4}{3}$

Simplify fractions on fractions

$\frac{1}{ \frac{1}{6} }$

Multiply by the inverse of denominator

$6$

Add both sides

$- \frac{4}{3} + 6$

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Uhh help lol<br> 5.3x + y = 28.5 <br> 4.2x + 3.1y = 27.2<br> find x and y

navik [9.2K]

Answer:

x = 5, y = 2

Step-by-step explanation:

First, isolate y in the top equation.

$y = -5.3x+28.5$

Next, substitute y in the bottom equation.

$4.2x + 3.1(-5.3x + 28.5) = 27.2$

$5.3x + y = 28.5$

Simplify.

$4.2x + -16.43x + 88.35 = 27.2$

Combine like terms.

$-12.23x + 88.35 = 27.2$

Isolate x on one side.

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Isolate x.

$x = 5$

Substitute x into $5.3x + y = 28.5$

$5.3(5) + y = 28.5$

Simplify.

$26.5 + y = 28.5$

Isolate y.

$y = 2$

$x = 5 \\y = 2$

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