X+y=0
x-y+2=0 i need help

x=-1,y=1

Step-by-step explanation:

x+y=0

x-y+2=0

Therefore 0=x+y

x-y+2=x+y

2y=2

y=1

x+1=0

x=-1

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2

answer: you need the equation in the question so i can answer it

step-by-step explanation: