(4 6/7 : (5/6+8/21)-2 5/13)*8 2/3=30 22/495/6+8/21=35/42+16/42=51/424 6/7:51/42=34/7*51/42=867/147=289/49289/49-2 5/13=3757/637-1519/637 =2238/637<span>2238/637*8 2/3=2238/637*26/3=1492/49=30 22/49</span>
<span>6(2-1.5x)+3(3x-2)
12-9x+9x-6
12-6=6
</span>