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Solve A=a+b+c+d divided by 4 for c

Sagot :

Given equation is
[tex]A = \frac{a+b+c+d}{4} [/tex]

Now we can multiply both sides by 4

[tex]4A = a+b+c+d[/tex]

On subtracting (a+b+d) on both sides.

[tex]4A -(a+b+d) = (a+b+c+d) - (a+b+d)[/tex]

[tex]4A - a - b - d = c[/tex]

So c is 
[tex]c = 4A - a -b-d[/tex]
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