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pychu [463]
3 years ago
15

What is the solution of the following system of equation x +y = 2 x - y = 4

Mathematics
1 answer:
sergiy2304 [10]3 years ago
7 0

Answer:

X+y=2

x-y=4

(x+y)+(x-y)= 2+4

X+y+x-y=6

2x=6

X=3

3+y=2    or 3-y=4

Y=-1

3+(-1)=2 or 3-(-1)=4

Step-by-station:

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The sum of two mumbers is 66 and the difference is 10. What are the numbers?
Luba_88 [7]

Answer:


Take 66 and subtract 10 to get 56  

Divide 56 by 2 to get 28 - this is the first number.  

Add 10 to 28 to get 38 - this is the second number.  

Prove by adding 28 + 38 to get 66


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What is the slope of the line perpendicular to y= -X-7
Sladkaya [172]

Answer:

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Step-by-step explanation:

3 0
3 years ago
3x20=3x(10+_) what is the answer?
Assoli18 [71]
The obvious answer to this would be 10.

The most simple way to do it would be taking out 3 x from each side of the equation and do 20 = 10 + _

Another way would be to actually solve it.

Let us put into the situation that the unknown variable would be y. The equation then would look like this.

3 x 20 = 3 x (10 + y)

Then solve

3 x 20 = 3 x (10 + y)
--------    ---------------
   3                  3
20 = 10 + y
20 - 10 = y
10 = y

10 would be the answer
3 0
3 years ago
Read 2 more answers
What is the first step in adding these equations to eliminate y? 5x+6y=9
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multiply all terms in the second equation by 2 to get the coefficient on the y variable to be -6.

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Water weighs about 8.34 pounds per gallon
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1pound is equal to 16 ounces i get this thru conversion table so you will multiply 8.34 pound to 16 so the answer is 133.44 ounces
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