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Blizzard [7]
2 years ago
7

Twice the sum of a number and six decreased by fifteen is the same as eighteen more than the product of five and the number. Fin

d the number.
Mathematics
1 answer:
Arlecino [84]2 years ago
4 0

Answer:

-9

Step-by-step explanation:

2(n+6) -15 = 5n+18

2n + 12 - 15 = 5n + 18

2n - 3 = 5n + 18

2n = 5n + 21

-3n = 21

n = -9

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half

Step-by-step explanation:

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2 years ago
Is (2, 7) a solution to this system of equations?<br> x + y = 9<br> 3x + 13y - 9
alukav5142 [94]

Answer:

No

Step-by-step explanation:

Assuming that you put the wrong sign for the second equation if you plug (2,7) into the two equations it only works for one equation.

8 0
3 years ago
Represent the following sentence as an equation. 3 times the sum of 12 and a number b. *
Romashka [77]
The correct answer is:
A- 3•12+b

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3 years ago
What is 1 1/4 + -3 5/6
julia-pushkina [17]

Answer:

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Step-by-step explanation:

Convert the mixed numbers to improper fractions, then find the LCD and combine and getting you -2 7/12

<u>Hopes this helps</u>

4 0
3 years ago
What is the answer?? Please help me!!! ❤️
oee [108]

Answer:

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Step-by-step explanation:

So let's start off by simplifying this expression:

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Now let's subtract common terms XD

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6 0
3 years ago
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