问题
解答题
解方程: X-0.8X-6=1
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答案
(1)X-0.8X-6=1,
0.2x-6=1,
0.2x-6+6=1+6,
0.2x=7,
x=7÷0.2,
x=35;
(2)
=x 0.5÷ 1 4
,0.15 60%
60%x=0.15×(0.5÷
),1 4
60%x=0.15×2,
60%x=0.3,
60%x÷60%=0.3÷60%,
x=0.5.
解方程: X-0.8X-6=1
|
(1)X-0.8X-6=1,
0.2x-6=1,
0.2x-6+6=1+6,
0.2x=7,
x=7÷0.2,
x=35;
(2)
=x 0.5÷ 1 4
,0.15 60%
60%x=0.15×(0.5÷
),1 4
60%x=0.15×2,
60%x=0.3,
60%x÷60%=0.3÷60%,
x=0.5.