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2 years ago

22 Solve for x. 3x - 5 = 10 x equals..... help

Mathematics

1 answer:

kramer2 years ago

7 0

Answer:

$x = 5$

Step-by-step explanation:

$3x - 5 = 10$

We want to isolate the x.

$3x - 5 = 10\\+5\;\;\;\;\;\;\;\;\; +5$

$3x = 15$

Now, we want the x not to have a coefficient. We want it just to be x =. We will do this via inverse operations. Since 3 x is 3 multiplied by x, we will divide each side by 3.

$\frac{3x}{3} \;=\;\frac{15}{3}$

$x = 5$

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Answer:

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3 years ago

A certain number has exactly 8 factors including 1 and itself. 2 of its factors are 21 and 35 what is the number?

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3 years ago

In a certain year, the average e-mail user sent or received 111 e-mails each day. The number of e-mails received was 3 more than

Ludmilka [50]

Answer:

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Step-by-step explanation:

Let,

x be the number of mails sent

y be the number of mails received

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y = 2x + 3 Eqn 2

Putting value of y from Eqn 2 in Eqn 1

x + 2x + 3 = 111

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3 years ago