问题
解答题
解方程.
4x-3.6x=36
5(x+1.5)=17.5.
答案
(1)4x-3.6x=36,
0.4x=36,
0.4x÷0.4=36÷0.4,
x=90;
(2)5(x+1.5)=17.5,
5(x+1.5)÷5=17.5÷5,
x+1.5=3.5,
x+1.5-1.5=3.5-1.5,
x=2.
解方程.
4x-3.6x=36
5(x+1.5)=17.5.
(1)4x-3.6x=36,
0.4x=36,
0.4x÷0.4=36÷0.4,
x=90;
(2)5(x+1.5)=17.5,
5(x+1.5)÷5=17.5÷5,
x+1.5=3.5,
x+1.5-1.5=3.5-1.5,
x=2.