-7x+8=9x, -x+2=4x, -9x-8=-8x, -x-7=-5x, -5x+2=-10x, -2x+3=-8x, -4x=-10x-9, 6+3x=4x-1, -1+2x=10x+3, -4+3x=8x+5, 9+4x=8x-9
1) x = 1/2 2) x = 2/5 3) x = -8 4) x = 7/4 5) x = -2/5 6) x = -1/2 7) x = 9/14 8) x = 7 9) x = -1/2 10) x = -9/5 11) x = 9/2