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Tutor profile: Sanda M.

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Sanda M.
New York University Math & Econ Graduate/ CGI Designer
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Questions

Subject: Pre-Algebra

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Question:

Solve: 16 + y = 27 solve for y

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Sanda M.
Answer:

Start by isolating the variable: (subtract 16 from both sides to isolate the y) y = 27 - 16 Solve y = 11

Subject: Basic Math

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Question:

Solve: 4.7 + .9 + .1 =

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Sanda M.
Answer:

Start by identifying decimals that add up to whole numbers to make the process more seamless. So: 0.9 + 0.1 = 1.0 Next, add the remaining integer to the whole number: 4.7 + 1.0 = 5.7 4.7 + .9 + .1 = 5.7

Subject: Algebra

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Question:

7x + 2(x + 7) = 28x – 7. Find x

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Sanda M.
Answer:

To begin, we need to use PEMDAS. Identify the parenthesis, and multiply through before isolating the 'x's. So: 7x + 2x + 14 = 28x - 7 (multiplied 2 by [x+7]) Next, we need to isolate the 'x's. Lets put them all on the left side. 7x + 2x - 28x + 14 = -7 ((subtracted 28x from both sides to remove it from the right and move it to the left)) Now, Isolate the independent numbers/integers without the variables 7x + 2x - 28x = -7 - 14 (we subtracted 14 from both sides) Now solve through each side! 7x + 2x - 28x = -7 - 14 9x - 28x = -21 -17x = -21 x = 21/17

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