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Sonbull [250]
3 years ago
11

Can someone help me understand how to solve a two variable equation I am really lost

Mathematics
1 answer:
Llana [10]3 years ago
7 0
Easiest method solving 2 unknowns is Substitution. 
So there will normally be 2(ormore)equations given. 
Say 
X+Y= a
 bX=cY + d 
a b c d are numbers they give
So first we rearrange the first equation
X  = a - Y 
No we substitute this into the 2nd equation so that we can get Y
since we know X = a-Y, 
b(a-Y) = cY + d 
we rearrange and we can find Y for this, it is just Y and numbers
hence finding Y, we sub the value for Y into X = a-Y and we get X also . 

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I need help with math
aksik [14]
Well what is the problem ?
8 0
3 years ago
the distance between Two Cities on a map is 4.125. find the actual distance if the scale on the map was 2 inches = 40 miles
atroni [7]

Answer:

85 miles.

Step-by-step explanation:

Lets begin by figuring out the number of miles in 4 inches. Since every 2 inches make 40 miles, we can figure out that there are 80 miles in 4 inches. To figure out that .125 part, we multiply 40 by .125, to get 5. We can add 80 plus 5 to get our grand total of 85 miles.

7 0
3 years ago
Simplify 2(x + 4) + 3(x - 4)<br><br> 5x - 4<br> 5x<br> 5x + 4
AnnyKZ [126]
The answer to this problem is 5x-4

7 0
3 years ago
27. The diameter of a music CD is 12 centimeters. Find the circumference
atroni [7]
Diameter is 2 times the radius. Radius is 6.
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Circumference is approximately 37.7cm
8 0
3 years ago
The formula for the volume of a sphere is V= 4/3 pi r cubed. what is the formula solved for r
Reil [10]
V=4/3π r^3

(3/4)V=π r^3

3V/4π = r^3

third root√(3V/4π)

<span><span>Hope this helps!
</span>and May the Force Be With You
</span><span>
-Jabba</span>
6 0
3 years ago
Read 2 more answers
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