解方程 3/4x=5/6 1/5+4x=4/5 x-2/3x=2/9

问题描述:

解方程 3/4x=5/6 1/5+4x=4/5 x-2/3x=2/9
计算,写出必要的计算过程.
36/25×75 11/8×20/19 6/7×21 16/5×3÷4/5
25/9÷5/4÷4/5 (7/8+13/16)÷13/16
计算(能简算的要简算)
3/4×3/1÷19/20 2/5×4+2/5 (21/8-4/1+3/8)×4/3
(4/5×1/9)×45 89×87/88 5/7×5/12+5/7×7/12

3/4x=5/6 x=5/6*4/3x=10/91/5+4x=4/54x=3/5x=3/20x-2/3x=2/91/3x=2/9x=2/336/25×75 =36*3=10811/8×20/19 =11/2*5/19=55/386/7×21=6*3=1816/5×3÷4/5=16/5*3*5/4=4*3=1225/9÷5/4÷4/5=25/9*4/5*5/4=25/9(7/8+13...