问题
解答题
巧解密码! (1)18%:
|
答案
(1)18%:
=3 20
,x 6.5
x=18%×6.5,3 20
x÷3 20
=1.17÷3 20
,3 20
x=7.8;
(2)3×(x+0.9)=5×(x-1.7),
3x+2.7=5x-8.5,
3x+2.7+8.5=5x-8.5+8.5,
3x+11.2-3x=5x-3x,
11.2÷2=2x÷2,
x=5.6.
巧解密码! (1)18%:
|
(1)18%:
=3 20
,x 6.5
x=18%×6.5,3 20
x÷3 20
=1.17÷3 20
,3 20
x=7.8;
(2)3×(x+0.9)=5×(x-1.7),
3x+2.7=5x-8.5,
3x+2.7+8.5=5x-8.5+8.5,
3x+11.2-3x=5x-3x,
11.2÷2=2x÷2,
x=5.6.