brookesamantha brookesamantha
  • 26-05-2018
  • Mathematics
contestada

2x +8y =20
-5x-20y=-50

Respuesta :

nikki263 nikki263
  • 27-05-2018
ax + by =12; 2x + 8y = 60. ax + by = 12; 2x + 8y = 60
Answer Link
destinyj213 destinyj213
  • 27-05-2018
System of Equations.
You can either substitute or eliminate a variable.

Substitue:
2x +8y =20
÷2 ÷2 ÷2
x +4y =10
x = -4y +10 (plug this into the second equation)
-5(-4y +10) -20y = -50 (distribute)
20y -50 -20y = -50
-50 = -50
0 = 0
Answer Link

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