4÷3x=12
解:12×3x=4
36x=4
x=1/9
(45-x)÷6=9
解:45-x=9×6
45-x=54
x=45-54
x=-9
84x-10=100x-26
解:84x-100x-10=-26
-16x=-26+10
-16x=-16
x=1
4÷3x=12
3x*12=4
36x=4
x=1/9
(45-x)÷6=9
45-x=54
x=45-54
x=-9
84x-10=100x-26
100x-84x=26-10
16x=16
x=1
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4÷3x=12
4=12*3x
36x=4
x=4÷36
x=1/9
(45-x)÷6=9
45-x=9*6
45-x=54
x=45-54
x=-9
84x-10=100x-26
100x-84x=26-10
16x=16
x=16÷16
x=1