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2 years ago

3.9x - 0.7 = 8.66, so what does x equal?

Mathematics

2 answers:

scoundrel [369]2 years ago

6 0

Answer:

x=2.4

Step-by-step explanation:

brainliest pls

blondinia [14]2 years ago

5 0

Answer:

The value of x is 2.4

Step-by-step explanation:

3.9x – 0.7 = 8.66

3.9x – 0.7 + 0.7 = 8.66 + 0.7

3.9x = 9.36

3.9x/3.9 = 9.36/3.9

x = 2.4

Thus, The value of x is 2.4

<u>-TheUnknownScientist</u><u> 72</u>

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3 years ago

What is the solution for the equation StartFraction 5 Over 3 b cubed minus 2 b squared minus 5 EndFraction = StartFraction 2 Ove

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Answer:

The solutions are:

$b=0,\:b=4$

Step-by-step explanation:

Considering the expression

$\frac{5}{3b^3-2b^2-5}=\frac{2}{b^3-2}$

Solving the expression

$\frac{5}{3b^3-2b^2-5}=\frac{2}{b^3-2}$

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$\mathrm{Switch\:sides}$

$6b^3-4b^2-10=5b^3-10$

$6b^3-4b^2-10+10=5b^3-10+10$

$6b^3-4b^2=5b^3$

$\mathrm{Subtract\:}5b^3\mathrm{\:from\:both\:sides}$

$6b^3-4b^2-5b^3=5b^3-5b^3$

$b^3-4b^2=0$

$Using\:the\:Zero\:Factor\:Principle:$ $if\:\mathrm ab=0\:\mathrm{then}\:a=0\:\mathrm{or}\:b=0\:\left(\mathrm{or\:both}\:a=0\:\mathrm{and}\:b=0\right)$