francesmueller francesmueller
  • 15-02-2021
  • Mathematics
contestada

13) y = 8x + 13
- 4x - 5y = 23

Respuesta :

Аноним Аноним
  • 15-02-2021

Answer:

x=42/44

Step-by-step explanation:

Because y=8x+13, You will have to insert 8x+13 into y.

-4x-5(8x+13)=23

distribute 5(8x+13)

5(8x)+5(13)

40x+65

Now you have this equation: -4x-40x+65=23.

subtract -65 on both sides

-4x-40x+65-65=23-65

-4x-40x= -42

Solve the x: -4x-40x= -44x

Now you have -44x=-42

Divide 44 on each sides

-x=-42/44

x=42/44

(simplified: 21/22)

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