tahanialala0000
tahanialala0000 tahanialala0000
  • 01-12-2020
  • Mathematics
contestada

Order the steps that should be used to solve a system of equations using elimination.

Respuesta :

NgShiYin
NgShiYin NgShiYin
  • 01-12-2020

Answer:

1. Find an expression(s) that can be eliminated.

2. Add the equations together (plus and minus & minus and plus) such that they cancel each other out.

Step-by-step explanation:

E.g.

2x +5 = 15 -----1

3x + 5 = 20 -----2

We are gonna eliminate 5 since it occurs in both equations.

2-1: 3x-2x+5-5 = 20-15

(+5-5) = 0, we are left with the x.

x = 5.

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