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ira [324]
3 years ago
15

-7-2x=7(x+8) What is the answer for this expression

Mathematics
1 answer:
sertanlavr [38]3 years ago
7 0

Answer:

x=-7

Step-by-step explanation:

1. Distribute the 7 into the parenthesis: -7-2x=7x+56

2. Combine like terms by doing the opposite operation to the numbers:  -7=9x+56 (added 2x to 7x)

3. Subtract 56 to each side of the equation: -63=9x

4. To isolate the variable "x," divide each side by 9: x=-7

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The sum of two numbers is 30. the first number is twice the second number. what are the numbers?
Fudgin [204]
Let the numbers be x and y.

by the first statement of the question, we get , x + y = 30.,,..(1)

by the second satement, we get , x = y+ y => x=2y... (2)

from equation (2), let us put the value of x in equation (1),
x + y = 30
=> 2y + y = 30
=> 3y = 30
=> y =30/3
=> y = 10

and x=2y => x = 2*10 = 20

in short, the numbers are 10 and 20

 
3 0
4 years ago
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Maslowich

this is the correct answer please follow me

4 0
3 years ago
Solve for x. Simplify completely.<br> x^2-9=55
djverab [1.8K]
★ Exponential reduction ★

x {}^{2}   - 9 = 55 \\ x {}^{2}  = 55 + 9 = 64 \\ x {}^{2}  = 64 = ( + 8) {}^{2}  \\ x =  + 8 \\
we didn't considered -8 because square root of any real number is always positive , or it's yours choice to deal with minus 8 also :)

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8 0
3 years ago
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Find the value of x. The diagram is not to scale.
Sergeu [11.5K]

Answer:

d. none of these

Step-by-step explanation:

7 0
3 years ago
135÷5, draw two different ways to break apart the array . use the distributive property to write products for each different way
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1 way is (100 divide by 5) +(35 divide by 5)
2 way is (50 divide by 5) + (85 divide by 5)
4 0
3 years ago
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