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soldier1979 [14.2K]
3 years ago
13

-2x - 8y = -16 2x - 7y = -14

Mathematics
2 answers:
Zinaida [17]3 years ago
5 0
For the first one , if your solving for x , the answer would be : x=8-4y
For the first one , if your solving for y , your answer would be : y=2-x/4

2x-7y=-14
Solving for x : x=-7 +7y/2
Solving for y : y=2+ 2x/7
pychu [463]3 years ago
5 0

Answer:

(0, 2)

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS
  • Equality Properties

<u>Algebra I</u>

  • Solving systems of equations using substitution/elimination
  • Solving systems of equations by graphing

Step-by-step explanation:

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

-2x - 8y = -16

2x - 7y = -14

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

<em>Elimination</em>

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

<u>Step 3: Solve for </u><em><u>x</u></em>

  1. Define original equation:                    2x - 7y = -14
  2. Substitute in <em>y</em>:                                     2x - 7(2) = -14
  3. Multiply:                                                2x - 14 = -14
  4. Add 14 to both sides:                           2x = 0
  5. Divide 2 on both sides:                        x = 0

<u>Step 4: Graph</u>

<em>Check the system</em>.

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