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2 years ago

Do 3 questions for 12 points.

Mathematics

1 answer:

tresset_1 [31]2 years ago

6 0

Answer:

3. -2

4. 12

5. -4

Step-by-step explanation:

For all problems, let n represent "a number." You will note that when we specify an operation to be done on the equation, it is done to <em>both sides of the equation</em>.

3. 5n +(-3) = -13

5n = -10 . . . . . . add 3

n = -2 . . . . . . . . divide by 5

The number is -2.

4. (n/2) -7 = -1

n/2 = 6 . . . . . . . add 7

n = 12 . . . . . . . . multiply by 2

The number is 12.

5. 2n -1 = -9

2n = -8 . . . . . add 1

n = -4 . . . . . . divide by 2

The number is -4.

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