# SOLUTION: how do i solve y=-x also how do i solve x=3y?

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 Question 415705: how do i solve y=-x also how do i solve x=3y?Found 2 solutions by Theo, Gogonati:Answer by Theo(3504)   (Show Source): You can put this solution on YOUR website!your equation is y = -x your dependent variable is y and your independent value is -x. you pick values of x and then you find values of y that correspond to that. when x = 1, y = -1 when x = 2, y = -2 when x = 3, y = -3 when x = 0, y = 0 when x = -1, y = 1 when x = -2, y = 2 etc. your equation is now x = 3y your dependent variable is now x and your independent variable is now y you would select values of y and then you would solve for values of x. when y = 1, x = 3*1 = 3 when y = 2, x = 3*2 = 6 when y = -5, x = 3*(-5) = -15 etc. with the equation x = 3y, if you want to make x the independent variable and you want to make y the dependent variable, you would need to switch the equation around. you would do that as follows: x = 3*y divide both sides of the equation by 3 to get: x/3 = y flip the sides of the equation to get: y = x/3 you have now made x the independent variable and y the dependent variable. when x = 3, y = 3/3 = 1 when x = 6, y = 6/3 = 2 when x = -15, y = -15/3 = -5 Answer by Gogonati(817)   (Show Source): You can put this solution on YOUR website!Solution: For y=-x all pairs of opposite numbers are the solution. (-2,2), -5,5), For x=3y the solution are pairs (n,3n) where n is a real number i.e (1,3), (-1,-3),(2,6), (-2,-6) e.c.t.