2x + 5 = 13 2x = 8 2x/2 = 8/2 x=4
2x-4y=-8-2x......-2x-4y=-2x-8(-4y)/-4 | (-2x-8)/-4y=1/2x+2
y=6x-16 y=-2x+8
2x+8 = 6 2x = 6-8 2x = -2 x = -1
2x-3 = 17 2x = 17+3 2x = 20 x = 10
8
3x + 8 = 2x +28 3x - 2x = 28 - 8 x=20
6x-8+2x-5 = 7-2x 6x+2x+2x = 7+8+5 10x = 20 x = 20/10 x = 2
Find the value of 'x' when 2x+8=4x+20 First subtract '2x' from both sides. 8=2x+20 Then subtract '20' from each side. -12=2x Then divide each side by '2' -6=x. Therefore 'x=-6'
2x-4 = 20 2x = 20+4 2x = 24 x = 12
2x + 5 = 13 2x = 8 2x/2 = 8/2 x=4
If you mean: -2x+8+20 then it can be simplified to 28-2x
2y + 2x = 20 y - 2x = 4 Add the two equations: 3y = 24 so that y = 8 Substitute this value of y in the second equation: 8 - 2x = 4 then 4 = 2x so that x = 2 Thus the ordered pair (y,x) = (8,2)
10
2x-4y=-8-2x......-2x-4y=-2x-8(-4y)/-4 | (-2x-8)/-4y=1/2x+2
-4x - 8 = -2x + 12Add 4x to each side:-8 = 2x + 12Subtract 12 from each side:-20 = 2xDivide each side by 2:-10 = x
no x would be 0.5 because two times 0.5 is 1 ( 2x ) and then add 7 equals 8 ( plus seven equals 8 )