Question

9) 6х +8y=-22 у = -5 ot_v8f-s-aa - 18 11) 1x+2y = -19 бke-06-a y=-5 10) -7x+2y = 18 6x +6y=0 -x+2y = 21 мое J 5 - 2 13) -7х + 4 y = 24 --21 х3 - дан 4 y = 0 - Чь-цуо 12) 3x - 5y = 17 y=-7 - Ту-17 27 14) 4x - y=20 - 2х - 2y = 10 Ч-1-20 -4 - 27.10 Чл-ау 2 - 4 -2 to 16) 6x - 12y = 24 - 6y = 4 Solve each system by elimination. 15) 8

Answer 1

10)

Given data:

The first equation is -7×+2y=18 .

The second equation is 6x+6y=0.

The second equation can be written as,

$\begin{gathered} 6x+6y=0 \\ 6x=-6y \\ x=-y \end{gathered}$

Substitute -y for x in the first equation.

$\begin{gathered} -7(-y)+2y=18 \\ 9y=19 \\ y=2 \end{gathered}$

The value of x is,

$x=-2$

Thus, the value of x is -2, and the value of y is 2.