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Helen [10]
3 years ago
8

Solve the system of equations by the addition method.−2x−y=0 10x+y=−8​

Mathematics
2 answers:
Thepotemich [5.8K]3 years ago
6 0

Answer:

(-1, 2)

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

<u>Algebra I</u>

  • Solving systems of equations using substitution/elimination

Step-by-step explanation:

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

-2x - y = 0

10x + y = -8

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

<em>Elimination</em>

  1. Combine equations:                         8x = -8
  2. Isolate <em>x</em>:                                            x = -1

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

  1. Define equation:                    -2x - y = 0
  2. Substitute in <em>x</em>:                       -2(-1) - y = 0
  3. Multiply:                                  2 - y = 0
  4. Isolate <em>y</em> term:                        -y = -2
  5. Isolate <em>y</em>:                                 y = 2
bija089 [108]3 years ago
5 0

Answer:

Step-by-step explanation:

-2x -y = 0

10x+ y= -8

8x = -8

x = -1

-10 + y = -8

y = 2

(-1, 2)

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