18=3y+3 6x+10=5x+15 -5n-16=3n 8-5n=10-4n 9m-8=6m+7 56-9n=-5n 15-8x=2-9x -6m+32=2m 10z+7=9z+5 10-9y=70-6y

18=3y+3 3y=18-3=15 y=15:3=5 6x+10=5x+15 6x-5x=15-10 x=5 -5n-16=3n 3n+5n=-16 8n=-16 n=-16:8=-2 8-5n=10-4n -4n+5n=8-10 n=-2 9m-8=6m+7 9m-6m=7+8 3m=15 m=15:3=5 56-9n=-5n -5n+9n=56 4n=56 n=56:4=14 15-8x=2-9x -8x+9x=2-15 x=-13 -6m+32=2m 32=2m+6m 8m=32 m=32:8=4 10z+7=9z+5 10z-9z=5-7 z=-2 10-9y=70-6y -9y+6y=70-10 -3y=60 y=-60:3=-20