3y + n = 250

y + n = 150

Equation 1 is in the correct format.

Equation 2 is in the correct format.

y + n = 150

y + n - n = 150 - n

y = 150 - n

3(y) + n = 250

3 * (150 - n) + n = 250

450 - 3n + n = 250

-3n + n = 250 - 450

-2n = -200

-2n | |

-2 |

= |

-200 |

-2 |

n = | -200 |

-2 |

n = 100

3y + 1(100) = 250

3y + 100 = 250

3y = 250 - 100

3y = 150

3y | |

3 |

= |

150 |

3 |

y = | 150 |

3 |

y = 50

- What are the 3 methods to solve a system of 2 equations?
- With the elimination method, what are you trying to eliminate?

CCSS.MATH.CONTENT.8.EE.C.8,CCSS.MATH.CONTENT.8.EE.C.8.B

y = **50** and n = **100**

Free Simultaneous Equations Calculator - Solves a system of simultaneous equations with 2 unknowns using the following 3 methods:

1) Substitution Method (Direct Substitution)

2) Elimination Method

3) Cramers Method or Cramers Rule Pick any 3 of the methods to solve the systems of equations 2 equations 2 unknowns

This calculator has 2 inputs.

1) Substitution Method (Direct Substitution)

2) Elimination Method

3) Cramers Method or Cramers Rule Pick any 3 of the methods to solve the systems of equations 2 equations 2 unknowns

This calculator has 2 inputs.

- cramers rule
- an explicit formula for the solution of a system of linear equations with as many equations as unknowns
- eliminate
- to remove, to get rid of or put an end to
- equation
- a statement declaring two mathematical expressions are equal
- simultaneous equations
- two or more algebraic equations that share variables
- substitute
- to put in the place of another. To replace one value with another
- unknown
- a number or value we do not know
- variable
- Alphabetic character representing a number

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