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xxTIMURxx [149]
3 years ago
6

X + y = 7, for x ....

Mathematics
2 answers:
satela [25.4K]3 years ago
5 0

Hey there!☺

Answer:\boxed{x=-y+7}

Explanation:

x+y=7

The first/last step we have is to add -y to both sides.

x+y+-y=7+-y\\x=-y+7

x=-y+7 is your answer.

Hope this helps!☺

Anuta_ua [19.1K]3 years ago
3 0

Answer:

x = -y + 7

    or

x = 7 - y

Step-by-step explanation:

x + y = 7

Step 1: Subtract y from both sides to get x alone.

x + y = 7

   -y    -y

x = 7 - y

Since x is alone and y is a variable & not a number, there's nothing else to do to the equation.

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Answer: Choice B

rose bush: $10, shrub: $4

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Work Shown:

x = cost for one rose bush

y = cost for one shrub

Rob's equation: 8x+5y = 100

Amy's equation: 8x+8y = 112

Subtract the equations straight down (match terms)

8x - 8x = 0x = 0, x terms go away

5y-8y = -3y

100-112 = -12

After those three subtractions, we end up with this new equation: -3y = -12

That equation solves to y = 4 when you divide both sides by -3

Use this value of y to find x

8x+5y = 100

8x+5(4) = 100 ... replace y with 4

8x+20 = 100

8x+20-20 = 100-20 .... subtract 20 from both sides

8x = 80

8x/8 = 80/8 ... divide both sides by 8

x = 10

We end up with x = 10 and y = 4 pairing up. The two equations, when graphed, cross at the location (10,4). One rose bush costs $10 and one shrub costs $4.

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3 years ago
PLEASE HELP! <br> Will try to give the brainliest!
dusya [7]

Answer:

L: (15+6x) W: 2

L: (10+4x) W: 3

L: (5+2x) W: 6

Step-by-step explanation:

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The area given,

30 + 12x

can be factored several ways to be able to fill in the table.

This kind of factoring is like "un-distributive property" where a common factor can be factored out of the expression. Usually its helpful to factor out the greatest common factor (GCF) but in this case any common factor will do.

Also, unless there are more directions, either factor may be the length or the width.

2(15+6x)

3(10+4x)

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Step-by-step explanation:

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If I assume that the equation truly is “h/3+ (-4) + -1 = 0” the answer would be h=15.

Comment down below if there are any specifications on t other parts of the equation.
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