Question

хелп ми плеаз плеаз пж

Answer 1

1) ax + 8y = 20     (- 3 ; - 2)

x = - 3     y = - 2

a * (- 3) + 8 * (- 2) = 20

- 3a - 16 = 20

- 3a = 36

a = - 12

$2) left { {{x-2y=-8} atop {7x-12y=7}} right.\\left { {{x=2y-8} atop {7*(2y-8)-12y=7}} right. \\left { {{x=2y-8} atop {14y-56-12y=7}} right.\\left { {{x=2y-8} atop {2y=63}} right.\\left { {{x=63-8} atop {y=31,5}} right.\\left { {{x=55} atop {y=31,5}} right.\\Otvet:boxed{(55;31,5)}$

Answer 2

https://znanija.com/task/34628125

Answer 3

pls