What is the awnser to -9xt4y=-17 9x-6y=3

Solve first to find y and -9+9 =0

-9x+4y=-17

9x-6y=3

2y= -14

Y= -14/2

Y=-7

Substitute your y answer into first equation solve to find x .

-9x+4(-7)= -17

-9x-28= -17

-9x= -17+28

-9x= 11

X= 11/-9

X= -1.2222 or -1 and 2/9

So answer is (-1.2222, -7)

your answer is 23/2 - 13.5

step-by-step explanation:

7/2 evaluates to

multiply x and 4.5

multiply x and 1

the x just gets copied along.

the answer is x

x

4.5*x evaluates to 4.5x

multiply 3 and 4.5x

multiply 1 and x

the x just gets copied along.

x

4.5*x*3 evaluates to 13.5x

7/2-4.5*x*3 evaluates to

  + 8 =

the answer is

7/2-4.5*x*3+8 evaluates to

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons