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natali 33 [55]
3 years ago
7

42x+25y=486, x+y=14show work please help asap!​

Mathematics
1 answer:
ruslelena [56]3 years ago
3 0
Rewrite equations:
x+y=14;42x+25y=486

Step: Solvex+y=14for x:
x+y=14
x+y+−y=14+−y(Add -y to both sides)
x=−y+14

Step: Substitute−y+14forxin42x+25y=486:
42x+25y=486
42(−y+14)+25y=486
−17y+588=486(Simplify both sides of the equation)
−17y+588+−588=486+−588(Add -588 to both sides)
−17y=−102
−17y
−17
=
−102
−17
(Divide both sides by -17)
y=6

Step: Substitute6foryinx=−y+14:
x=−y+14
x=−6+14
x=8(Simplify both sides of the equation)

On Fri, Sep 20, 2019 at 12:08 PM ESQULESE BLACK wrote:

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It would take 5 1/3 hours

Step-by-step explanation:

<u>Step 1:  Make an expression</u>

8 * 2/3 = x

<u>Step 2:  Multiply</u>

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3/3 + 3/3 + 3/3 + 3/3 + 3/3 + 1/3

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Answer:  It would take 5 1/3 hours

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4 years ago
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1 1/2 pounds of milk is how many cups?
inna [77]

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4 0
3 years ago
The sum of three times a numbet (x)and 15 is 42 find the number​
ladessa [460]
<h3>Given:</h3>

The sum of three times a Number (x) and (15) is equal to 42.

<h3>To find:</h3>

The numbers.

<h3>Solution:</h3>

The first no. will be \sf{3x(3×x=3x)}

And,the second no. will be \bf{15}

<h3>A/Q</h3>

\implies\sf{3x+15=42}

\implies\sf{3x=42-15}

\implies\sf{3x=27}

\implies\sf{x=}\dfrac{27}{3}

\implies\sf{x=9}

Therefore,the first number will be ,

\leadsto{3x=3×9=27}

\bf\underline\green{Verification:-}

\leadsto\bf{27+15=42}

\leadsto\bf{42=42}

Hence,Verified.

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