8x-5.5x=7.5
7.2x÷3.6=2 3x＋6x-8x=0.7 12x-2x-5x=4.5
12x-x=0 5x＋x=1.8 3.2x＋1.8x=6
4.8x-0.8x=6 6.3-0.3x=9.6 8.6x-8.5x=0.7
20x-2x=36 9x＋6x=4.5 18x-12x=5.4
2x-1.6x=3.6 18x＋3x=7×6 1.2x-0.5x=0.7
1.3x＋2.7x=1 4x-3.2x=6.4 0.8x＋3.2x＋3x=56
2.8x-2x=7.2 4.7x＋2.3x=0.7×5 6x-4x=38
x＋3.5x=9 x＋x＋x=15