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kobusy [5.1K]
3 years ago
12

Solve the equation 7x-2(x-10)=40

Mathematics
2 answers:
bekas [8.4K]3 years ago
5 0

Answer:

7

−

2

(

−

1

0

)

=

4

0

7x{\color{#c92786}{-2(x-10)}}=40

7x−2(x−10)=40

7

−

2

+

2

0

=

4

0

Step-by-step explanation: therefore your answer would be x=4  

BRAINLIEST PLEASE

mylen [45]3 years ago
3 0

Answer:

x=4

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

7x−2(x−10)=40

7x+(−2)(x)+(−2)(−10)=40(Distribute)

7x+−2x+20=40

(7x+−2x)+(20)=40(Combine Like Terms)

5x+20=40

5x+20=40

Step 2: Subtract 20 from both sides.

5x+20−20=40−20

5x=20

Step 3: Divide both sides by 5.

5 divided by 20 = 4

5 divided by 5 =1

x=4

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How to factorize -3pa-9b-18pc
Fed [463]
-3pa - 9b - 18pc

For starters, you know that you can't take away any of the letters from the equation because none of the three have the exact same letter; however, they all have something they can be divided by and that is -3. 

It would be -3 instead of just 3 because the equation itself starts with a negative. (you could probably do it anyways with just 3, but you'd end up taking out a negative one, anyways, so what's the point?)

Now, you would have: -3 ( pa + 3b + 6pc )

That is truly all you can take out. So, that would end up being your answer since all you can really do is simplify.  
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Read 2 more answers
-2x - y = -9<br><br>5x -2y = 18<br>Solve as a whole number
nexus9112 [7]

Answer:

x = 4, y = 1

(4, 1)

Step-by-step explanation:

-2x - y = -9

5x -2y = 18

-2x - y = -9

+2x     +2x

-y = 2x - 9

/-1    /-1

y = -2x + 9

5x -2y = 18

5x - 2(-2x + 9) = 18

5x + 4x - 18 = 18

9x - 18 = 18

    + 18   + 18

9x = 36

/9  /9

x = 4

Now, we solve for y:

-2(4) - y = -9

-8 - y = -9

+ 8     +8

-y = -1

/-1  /-1

y = 1

(x, y) -> (4, 1)

Hope this helps!

6 0
3 years ago
A brand of uncooked spaghetti comes in a box that is a rectangular prism with a length of 10 inches, a
tankabanditka [31]

Answer:

Surface area means all of the outside areas, kind of like when you wrap a present.

Step-by-step explanation:

1st draw the box and find the area of the top and the bottom of the figure

10 x 3 = 30 for the top and 30 for the bottom, so 60 for both.

2nd find the area of two opposite sides:

10x 4.5 = 45 for one side and 45 for the other side, which is 90 for both

3rd find the area of the last two opposite sides:

3 x 4.5 = 13.5 for one side and 13.5 for the other side, so 27 for both.

4th:  now add all those sides 60 + 90 + 27 = 177 inches squared.

8 0
3 years ago
Solve the following equation for r : (1/t(t-1)) - 1/t = 3/t-1
givi [52]

Domain:\\\\t(t-1)\neq0\to t\neq0\ \vee\ t\neq1

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8 0
4 years ago
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