问题 解答题

解方程.

6X-30=24×20.75X-3×0.8=02X:0.6=0.9:3.

答案

(1)6x-30=24×2,

6x-30=48,

6x-30+30=48+30,

6x=78,

6x÷6=78÷6,

x=13;

(2)0.75x-3×0.8=0,

0.75x-2.4=0,

0.75x-2.4+2.4=0+2.4,

0.75x÷0.75=2.4÷0.75,

x=3.2;

(3)2x:0.6=0.9:3,

6x=0.6×0.9,

6x÷6=0.54÷6,

x=0.09.

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