问题
解答题
解方程或解比例.
|
答案
(1)x-0.5x=27.5,
0.5x÷0.5=27.5÷0.5,
x=55;
(2)(x-6)×(1+40%)=56,
(x-6)×1.4÷1.4=56÷1.4,
x-6+6=40+6,
x=46;
(3)9:x=
:1 5
,1 3
x=9×1 5
,1 3
x÷1 5
=3÷1 5
,1 5
x=15.
解方程或解比例.
|
(1)x-0.5x=27.5,
0.5x÷0.5=27.5÷0.5,
x=55;
(2)(x-6)×(1+40%)=56,
(x-6)×1.4÷1.4=56÷1.4,
x-6+6=40+6,
x=46;
(3)9:x=
:1 5
,1 3
x=9×1 5
,1 3
x÷1 5
=3÷1 5
,1 5
x=15.