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4vir4ik [10]
3 years ago
5

Simple the expresión 7x(1-9)

1 - 9)" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
Lostsunrise [7]3 years ago
5 0
7x(1-9)

7x(-8)

(7)(-8)x

-56x
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General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

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  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
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Step-by-step explanation:

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

-6x + 5y = 34

-6x - 10y = 4

<u>Step 2: Rewrite Systems</u>

-6x + 5y = 34

  1. Multiply everything by -1:                    6x - 5y = -34

<u>Step 3: Redefine Systems</u>

6x - 5y = -34

-6x - 10y = 4

<u>Step 4: Solve for </u><em><u>y</u></em>

<em>Elimination</em>

  1. Combine 2 equations:                    -15y = -30
  2. Divide -15 on both sides:                y = 2

<u>Step 5: Solve for </u><em><u>x</u></em>

  1. Define equation:                    -6x - 10y = 4
  2. Substitute in <em>y</em>:                       -6x - 10(2) = 4
  3. Multiply:                                  -6x - 20 = 4
  4. Add 20 on both sides:          -6x = 24
  5. Divide -6 on both sides:       x = -4
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