What is the substitution method for 2x=8 and x+y=2

Step-by-step explanation:

You can use substitution method in two ways.

1 way: From the first equation you can express x by dividing the whole equation by 2:

and substitute this x-value into the second equation:

2 way: From the second equation you can express x:

and substitute it into the first one:

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step-by-step explanation: vsfdvsfvd

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