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Nady [450]
3 years ago
9

Eighteen less than three times a number is twice the number. Write and solve

Mathematics
1 answer:
goblinko [34]3 years ago
8 0

Answer:

The number is 18

Step-by-step explanation:

You can write an equation to represent this. Let x represent the unknown number.

3x - 18 = 2x

Move 2x to the left side. Remember, "change the side, change the sign." Add 0 as a placeholder to the right of the equals sign.

3x - 2x - 18 = 0

Simplify like terms.

x - 18 = 0

Move -18 to the right of the equals sign.

x = 18

Now that we know x = 18, we can substitute it into the problem.

"Eighteen less than three times 18 is two times 18."

18 x 3 = 54

54 - 18 = 36

36 is, in fact, two times 18. We can check this by dividing 36 by 2.

36 ÷ 2 = 18

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Carlos and Mike earn same amount for 10 hours of part time work

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Let "x" be the number of hours worked by Carlos and mike

Given that,

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Thus, total amount earned by Carlos for "x" hours is given by:

total earned = 7.25(number of hours) + $ 10

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Thus, total amount earned by Mike for "x" hours is given by:

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7.75x - 7.25x = 10 - 5

0.5x = 5

x = 10

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10t = b - 4

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This is a system of equations. I’ll be solving through substitution.

In the first equation. solving for b (the easier variable to isolate) gives you:

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Substitute this into the second equation:

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G = -7 and h = 3 What is the answer for g+h=
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