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topjm [15]
3 years ago
10

What is .7 divided by 21? show your work

Mathematics
1 answer:
IrinaK [193]3 years ago
3 0
7/21 math problems division = 0.333333333333.
0.333333333333 to 2 decimal places= 0.33

7/21 divided by 2 » (7/21) ÷ 2 » 0.333333333333 ÷ 2 = 0.166666666667 in long division

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Y= 3x-1<br> 2x+6=y substitution method
vfiekz [6]

Answer: (7, 20)

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There are three general ways to solve systems of equations:

  1. Elimination
  2. Substitution
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Since the question has specific requirements, we are going to use <u>substitution </u>to solve the equations.

Solve:

<u>Given equations</u>

y = 3x - 1

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<u>Substitute the y value since both equations has isolated [y]</u>

2x + 6 = 3x - 1

<u>Add 1 on both sides</u>

2x + 6 + 1 = 3x - 1 + 1

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<u>Subtract 2x on both sides</u>

2x + 7 - 2x = 3x - 2x

\boxed{x=7}

<u>Find the value of y</u>

y = 3x - 1

y = 3(7) - 1

y = 21 - 1

\boxed{y=20}

Hope this helps!! :)

Please let me know if you have any questions

3 0
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