# Math

posted by on .

1)The sum of a number and 17 more than twice the same number is 101. Find the number.

17+2n=101
17-17
101-17
2n=84
n=42(answer)

2)Evaluate: 5-/a+5b/ if a=-12 and b=2.

5-/-12+5(2)/
5-/-12+10/
5-/-2/
5-2
3(answer)

• Math - ,

1. The sum of a number and 17 more than twice the same number is 101 should be:
n + (2n+17) = 101

• Math - ,

Yes, I totally missed some of the wording.

Yes, Quidditch is right for question 1.

Good looking out, Quidditch!

blueridge

• Math - ,

OK, I think you are correct
5 - |-2|
=5-2
=3

• Math - ,

2. I am not sure what
5-/-2/
means.
If / is supposed to be a bracket or parenthesis then:
5-[-2]
=5+2

• Math - ,

/ is suppose to be absolute value

• Math - ,

The equation is set up correctly. Good job!

Let's see:

17 + 2n = 101....Original Equation

Subtract 17 from both sides.

2n = 101 - 17

2n = 84

Now divide both sides by the coefficient 2 to find the value of n.

n = 84/2

n = 42

Is this true?

Let's plug 42 for n in the Original Equation above and simplify. If we get the same answer on both sides, then n = 42 is right.

You developed:

17 + 2n = 101....Original Equation

Let n = 42

17 + 2(42) = 101

17 + 84 = 101

101 = 101...It checks!!!

Yes, n = 42.

=========================

NEXT: You are told to evaluate.
To evaluate means to replace the variables given with the given values and simplify.

Evaluate: 5-/a+5b if a =-12 and
b = 2.

However, I just noticed that you made a typo in terms of 5.

What exactly are you subtracting from 5?

Do you see what I mean?

The second question is not typed correctly.

Write back when you fix the typo.

• Math - ,

Part 1
I don't think you set up the equation correctly. See me first response

• Math - ,

I know that and I thanked you for correcting me.

We all make mistakes, right?

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