2 years ago

HELP FAST PLEASEE 3x + 5 = -16

Mathematics

2 answers:

Masja [62]2 years ago

7 0

Answer:

x = -7

Step-by-step explanation:

3x + 5 = -16

-5 -5

------------------

3x = -21

/3 /3

------------------

x = -7

Check your answer:

3x + 5 = -16

3(-7) + 5 = -16

-21 + 5 = -16

-16 = -16 CORRECT

kobusy [5.1K]2 years ago

5 0

-7
The answer is -7

..

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sam had 70 erasers and rulers. after giving away 1/3 of his erasers and 10 rulers, he had an equal number of erasers and rulers

Radda [10]

Answer:

36 erasers

Step-by-step explanation:

Let number of erasers be e

let number of rulers be r

We can write:

e + r = 70

and

After giving away, he has

Erasers: 2/3e

Rulers: r - 10

These two are equal, so we can write and solve:

2/3e = r - 10

2/3e + 10 = r

Putting this in initial equation, we have:

e + (2/3e + 10) = 70

5/3e + 10 = 70

5/3 e = 60

e = 36

And rulers is:

r = 2/3(36) + 10 = 34

Hence, he had 36 erasers in the beginning

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