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Elodia [21]
3 years ago
8

Due in an hour! hour​

Mathematics
2 answers:
VLD [36.1K]3 years ago
5 0

Answer:

Step-by-step explanation:

Hope this helps u !!

Lady_Fox [76]3 years ago
3 0

Answer:

( 1 , 2 )

Step-by-step explanation:

x + 4y = 9

x = 9 - 4y .... ( 1)

2x - 4y = -6 ...( 2)

substitute the 9 - 4y as x in the second equation

<u>2( 9 - 4y )</u> - 4y = -6

distribute 2

18 <u>- 8y - 4y</u> = -6

combine like terms

18 - 12y = -6

Subtract 18 from both sides

<u>18 - 18</u> - 12y = <u>-6 - 18</u>

- 12y = - 24

divide both sides by -12

<u>-12y / -12</u> = <u>-24/-12</u>

y = 2

Now , substitute the 2 as y in the second equation

2x - 4y = -6

2x - 4 ( 2 ) = -6

2x - 8 = -6

add 8 to both sides

2x<u> - 8 + 8</u> =<u> -6 + 8</u>

2x = 2

divide both sides by 2

2x / 2 = 2/2

x = 1.

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Step-by-step explanation:

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3 years ago
5(x+4)= -2(-4-x)+3 <br> what is the answer?
lianna [129]

Answer:

x = -3

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS
  • Equality Properties

Step-by-step explanation:

<u>Step 1: Define equation</u>

5(x + 4) = -2(-4 - x) + 3

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Distribute:                                   5x + 20 = 8 + 2x + 3
  2. Combine like terms:                   5x + 20 = 2x + 11
  3. Subtract 2x on both sides:        3x + 20 = 11
  4. Subtract 20 on both sides:        3x = -9
  5. Divide 3 on both sides:              x = -3

<u>Step 3: Check</u>

<em>Plug in x to verify it's a solution.</em>

  1. Substitute:                    5(-3 + 4) = -2(-4 - -3) + 3
  2. Simplify:                        5(-3 + 4) = -2(-4 + 3) + 3
  3. Add:                              5(1) = -2(-1) + 3
  4. Multiply:                        5 = 2 + 3
  5. Add:                              5 = 5

Here we see that 5 does indeed equal 5. ∴ x = -3 is a solution of the equation.

And we have our final answer!

5 0
3 years ago
Read 2 more answers
Solve for the variable.<br> The quotient of a number n divided by -4.5 equals 200.6.
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Answer:

n = -902.7

Step-by-step explanation:

n/-4.5 = 200.6

n = (-4.5)(200.6)

n = -902.7

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2 years ago
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