Question

Solve the system of equations by substitution - 5x+8y= -86 y=6x-43 ​

Answer 1

Answer:

(6 ,-7)

Step-by-step explanation:

$- 5x + 8y = - 86 \\ y = 6x - 43 \\ - 5x = - 86 - 8y \\ x = 17.2 + 1.6y \\ y = 6(17.2 + 1.6y) - 43 \\ y = 103.2 + 9.6y - 43 \\ 8.6y = - 60.2 \\ y = - 7$

$x = 17.2 + 1.6( - 7) \\ x = 17.2 - 11.2 \\ x = 6$