SOLUTION: Can someone please help....don't know how to solve these problems...have to solve these using the addition or subtraction method.... x+y=8 x-y=2

Algebra ->  Expressions-with-variables -> SOLUTION: Can someone please help....don't know how to solve these problems...have to solve these using the addition or subtraction method.... x+y=8 x-y=2      Log On


   



Question 399617: Can someone please help....don't know how to solve these problems...have to solve these using the addition or subtraction method....
x+y=8
x-y=2

Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


You already have one of the variables with additive inverse coefficients -- the coefficient on y in the first equation is 1 and the coefficient on y in the second equation is -1, so just add the two equations, term by term, and the y variable will go away.

x plus x is 2x, y plus -y is 0, and 8 plus 2 is 10. so 2x = 10. Solve for x.


John

My calculator said it, I believe it, that settles it
The Out Campaign: Scarlet Letter of Atheism