mollycrisp14 mollycrisp14
  • 13-01-2021
  • Mathematics
contestada

Solve the simultaneous equations
5x + y = 21
3x + y = 13
X =
Y =

Respuesta :

NagThiriKo
NagThiriKo NagThiriKo
  • 13-01-2021

Answer:

x=? y=?

  • 5x+y=21 equation 1
  • 3x+y=13

y=13-3x

  • y=13-3x in equation 1

5x+(13-3x)=21

5x+13-3x=21

2x+13=21

2x=21-13

2x=8

x=8/2

x=4

  • x=4 in equation 1
  • 5(4)+y=21

20+y=21

y=21-20

y=1

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