8x+9=9x-18+9 = 8x+9=9x-9 = 1x=0 (:
8x-2 = -9+7x8x-7x = -9+2x=-7
X equals 9.
x=4, y=9 (4,9)
x = 9.
76
8x - 9 = 11x + 12 8x = 11x + 21 -3x = 21 x = -7
-8x+7 = -7x-2 -8x = -7x-2-7 -8x=-7x-9 -8x+7x=-9 -1x=-9 x=-9/-1 x=9
x = -2
x= -8
x=-7
2x+6x=-9 => 8x=-9=> x=-8/9