Do 3 questions for 12 points.

  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 both sides of the equation.

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

  5n = -10 . . . . . . add 3

  n = -2 . . . . . . . . divide by 5

The number is -2.

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

  n/2 = 6 . . . . . . . add 7

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

The number is 12.

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5. 2n -1 = -9

  2n = -8 . . . . . add 1

  n = -4 . . . . . . divide by 2

The number is -4.

x=17

step-by-step explanation:

solve 3x-24=x+10

then that makes it 2x=34 because you subtract an x from both sides to get rid of the one on the right, and then you add 24 to both sides to get rid of the 24 on the left

divide by both sides by 2 to get your answer so that you can get your answer