Ta có x/33-x/45=2/3
x/45=x/33-2/3
x/45=x/33-22/33
x/45=x-22/33
=>33x=(x-22)*45
=>33x=45x-990
=>33x-45x=-990
=>-12x=-990
=>x=82,5
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Ta có x/33-x/45=2/3
x/45=x/33-2/3
x/45=x/33-22/33
x/45=x-22/33
=>33x=(x-22)*45
=>33x=45x-990
=>33x-45x=-990
=>-12x=-990
=>x=82,5