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snow_tiger [21]
3 years ago
15

\frac{1}{5}k-9=\frac{3}{5}k-7

Mathematics
1 answer:
Oksi-84 [34.3K]3 years ago
6 0

let start by multiplying both sides by the LCD of all denominators, in this case that'd be 5, to do away with the denominators.


\bf \cfrac{1}{5}k-9=\cfrac{3}{5}k-7\implies \stackrel{\textit{multiplying by }\stackrel{LCD}{5}}{5\left( \cfrac{1}{5}k-9 \right)=5\left( \cfrac{3}{5}k-7 \right)}\implies k-45=3k-35 \\\\\\ -45=2k-35\implies -10=2k\implies \cfrac{-10}{2}=k\implies -5=k

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DUE BEFORE 5:OO!!!!!!
AleksAgata [21]
X + y = 6
x - 6y = -9

Subtract the equations, you get:

y - (-6y) = 6 - (-9)
7y = 15

y = 15/7

x + 15/7 = 6
x + 15/7 = 42/7
x = (42-15)/7
x = 27/15

None of your answer choices are correct, since the solution to the systems of equation is (27/15, 15/7)
6 0
3 years ago
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lyudmila [28]

Answer:

x=-26

Step-by-step explanation:

Subtract 45 from both sides.

-85-45=5x

Simplify  -85-45 to  -130

-130=5x

Divide both sides by 5.

-130/5=x

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3 years ago
Simplify the following expressions
Zigmanuir [339]

Answer:

4x -2y + 8z

Step-by-step explanation:

10 / 4 = 4x

-5y / 2.5 = -2y

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resulting in 4x -2y + 8z.

7 0
3 years ago
Which point is a solution for this system of inequalities?<br> y &gt; -x<br> y &lt; 2x
Alika [10]
X  > 0 and -x < y <span>< 2x There you go, it is infinite applying to those rules.</span>
4 0
3 years ago
What is 1/4(9y-3)+1/8(6y+9) simplified?
dusya [7]

Answer:

3y+3\8

Step-by-step explanation:

8 0
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