kashwell215
kashwell215 kashwell215
  • 25-01-2022
  • Mathematics
contestada

2x - y=17 and x-y=10
Solve with substitution, show work?

Respuesta :

semsee45
semsee45 semsee45
  • 25-01-2022

Answer:

x = 7    y = -3

Step-by-step explanation:

x - y = 10   ⇒   x = 10 + y

Substitute  x = 10 + y  into 2x - y = 17:

2(10 + y) - y = 17

20 + 2y - y = 17

y = -3

Substitute the found value of y into x = 10 + y to find x:

x = 10 - 3 = 7

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