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aliina [53]
3 years ago
13

Please simplify! x+9=21+3x-4+10

Mathematics
2 answers:
Zina [86]3 years ago
8 0

Answer:

x= -9

Step-by-step explanation:

- Put all the same signs together

x-3x = 21-4+10-9

*Quick tip:

  -when you cross a sign with a number or without a number over the equal  

   sign you have to change the sign (positive to negative and negative to    

   positive.

  -x and 1x is the same thing

- Calculate small sections by small sections

-2x = 17 + 1

-2x= 18

-2/-2x = 18/-2

x= -9

skad [1K]3 years ago
6 0

Answer:

-9

Step-by-step explanation:

Step 1 : Put like terms together

x + 9 = 21 + 3x - 4 + 10

Subtract 3x on both sides

-2x + 9 = 21 - 4 + 10

Subtract 9 on both sides

-2x = 21 - 4 + 10 - 9

Simplify

-2x = 18

Step 2 : Divide

\frac{-2x}{-2} = \frac{18}{-2}

x = -9

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The original price of the hat is $35. Paolo paid $28 for the hat.

So discount for the hat is $(35-28) = $7

$7 is discounted from $35. We have to find the percentage of the discount.

To find the percentage we have to divide the discount amount by the original price and then have to multiply it by 100.

So the discount percentage =

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We can simplify 7/35 by dividing 7 and 35 both by 7. So we will get 1/5 after simplifying.

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dalvyx [7]

Answer:

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Step-by-step explanation:

The ratios of sine and cos are defined as follows:

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Since we are looking at the angle A, the opposite side with respect to A would be the side length of 84. That leaves the side 13 as the adjacent side.

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7 0
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Answer:

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Answer:
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