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3 years ago

−px+r=−8x−2 solve for X

Mathematics

2 answers:

Arlecino [84]3 years ago

5 0

-8x-2=0
-8x=2
8x=-2
x=-1/4

luda_lava [24]3 years ago

5 0

Answer:

$\frac{-2-r}{-p+8}$ .

Step-by-step explanation:

-px+r= -8x-2

-px+8x = -2-r

x(-p+8) = -2-r

x = $\frac{-2-r}{-p+8}$ .

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Step-by-step explanation:

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Required

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There are several ways to solve this; the best is by using Venn diagram (see attachment for diagram)

Solving (a):

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This is calculated as:

$n(A\ u\ B) = n(A) + n(B) - n(A\ n\ B)$

From the attachment

$n(A) = 0+2+4+2 = 8$

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Solving (b):

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$n(A'\ u\ C) = n(A') + n(C) -n(A'\ n\ C)$

From the attachment

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So:

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Solving (c):

$n(A\ n\ B)'$

This is calculated as:

$n(A\ n\ B)' = n(U) - n(A\ n\ B)$

$n(A\ n\ B)' = 12- 6$

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