(1)4x=4/5+6/5=2 x=1/2
(2)-3/4x=9-12=-3 x=4
(3)3/4x=5/21*14/15 x=8/27
(4)5/6x*6=15 x=3麻烦您在写工整点怎么工整?例如第一题 4x-6×1/5=4/54x=4/5+6/54x=2x=2÷4x=1/2(2)4*5-3/4x=9(刚才我做的时候,把刚才的题号乘进去了) 20-3/4x=9-3/4x=-11 x=44/3(3)3/4x*15/14=5/21 3/4x=5/21*14/15 3/4x=2/9x=8/27(4)5/6x÷1/6=155/6x*6=15 5x=15x=3好了~~