Please help
x-2.6y=-3.2

-x+4.5Y=7

one solution : (2,2)

Step-by-step explanation:

hello :

the system is : x-2.6y=-3.2 (*)

                         -x+4.5y=7(**)

add(*) and(**) : -2.6y+4.5y = -3.2+7

                         1.9y=3.8

y = 3.8/1.9 =2

put this value in (*) : x - (2.6)(2) =-3.2

x =(2.6)(2) -3.2 =2

one solution : (2,2)

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

nlgqer

step-by-step