问题
解答题
解方程 (1)18%:
(2)2(Χ+1)=1-(Χ-4) |
答案
(1)18%:
=3 20
,Χ 6.5
x=18%×6.5,3 20
x×3 20
=1.17×20 3
,20 3
x=7.8;
(2)2(x+1)=1-(x-4),
2x+2=1-x+4,
2x+2=5-x,
2x+2+x=5-x+x,
3x+2-2=5-2,
3x÷3=3÷3,
x=1.
解方程 (1)18%:
(2)2(Χ+1)=1-(Χ-4) |
(1)18%:
=3 20
,Χ 6.5
x=18%×6.5,3 20
x×3 20
=1.17×20 3
,20 3
x=7.8;
(2)2(x+1)=1-(x-4),
2x+2=1-x+4,
2x+2=5-x,
2x+2+x=5-x+x,
3x+2-2=5-2,
3x÷3=3÷3,
x=1.