lunajacob647 lunajacob647
  • 22-03-2017
  • Mathematics
contestada

2x + y = 7
y = x + 1
When the expression x+1 is substituted in for y in the first equation, the result is

x + 1 = 7
2x + 1 = 7
3x + 1 = 7

Respuesta :

Аноним Аноним
  • 22-03-2017
2x + y = 7
2x +x + 1 = 7
3x + 1 = 7

answer : 
3x + 1 = 7
Answer Link
Аноним Аноним
  • 22-03-2017
y = x+1

When the expression x+1 is substituted in for y in the first equation
2x + y = 7
⇒ 2x + (x+1) = 7
⇒ 2x + x + 1 = 7
⇒ 3x + 1 = 7

Hope it helps!
Answer Link

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