Questions & Answers for: x 2y 8 2x y 8

...67 A. 3X+(-1.67)=2 3X-1.67=2 3X=2+1.67 3X=3.67 X=3.67/3 X=1.22 (3x-2y)2 = 2x=4 3x+y=2;2x-y sol'n: 3x+y=2 y=2x-3 3x+2x-3=2 5x\5=2+3\5 x=1 3(1)+y=2 3+y=2 y=2-3 y=-1 ans.x=1;y=-1 ...

4x+8y=20 -4x+2y=-30 4x+8y=20 || /4 x+2y=5 x=5-2y -4x+2y=-30 || /2 -2x+y=-15 -2(5-2y)+y=-15 -10+4y+y=-15 5y=-5 y=-1 x=5-2y || y=-1 x=5-2(-1) x=5+2 x=7

2x-4y=8 simplify 2x-4y=8 => 2[x-2y]=8 => x-2y=8/2 => x-2y=4

2x + 4y = -8 ; divide each side by 2 x + 2y = -4 ; subtract x from both sides 2y = -4 - x ; rearrange 2y = -1x -4 ; divide each side by 2 y = -1/2x - 2 ; relate to slope/intercept form of line (y=mx+b

...2x+3y)(3x+2y) (2x - 3y)(3x + 2y) = 2x*3x + 2x*2y - 3y*3x - 3y*2y = 6x^2 + 4xy - 9xy - 6y^2 = 6x^2 - 5xy - 6y^2 You multiply each element in the first set of brackets by each element in the second set ...

2x - 4y = 20 4x + 2y = -20 This should start wit X=something and Y=something, sorry I'm not an human algebra calculator.... you need to single out one of the variables but the same in both ...

...2x+2y Then 6-2x+2y=3x+5 Get the constant terms on the left and the variable ones on the right 6-5=3x+2x-2y or 1=5x-2y. I prefer to have the variables on the left, so I swap left and right 5x-2y=1 or ...

...16x-2y=16 and 4x=2y-8 Both should work. 16x - 2y = 16 4x - 2y = -8 ----------------- 12x = 24 x = 2 y = 8 2y=4x + 8 y = 2x + 4 16x - 2(2x + 4) = 16 16x - 4x -8 = 16 12x = 24 x = 2 y = 8 Good luck. ...

2y=2-4x And then divide both sides of the equation by two: y=1-2x Since we now have y in terms of x, we can substitute this into our second equation. -3x-y=-3 -3x-(1-2x)=-3 Then, we can distribute the

...2y-2=2x. Describe the results y = x+1 y = (4) + 1 y = 5 y = x + 1 y = (-4) + 1 y = -3 2y - 2 = 2x 2y - 2 = 2 (4) 2y - 2 = 8 2y - 2 + 2 = 8 + 2 2y = 10 2y/2 = 10/2 y = 5 2y - 2 = 2(-4) 2y - 2 = -8 2y ...