问题
解答题
解方程.
5x+4x=4.5
50y-10y=680
4m-2.5m=3.
答案
(1)5x+4x=4.5,
9x=4.5,
9x÷9=4.5÷9,
x=0.5;
(2)50y-10y=680,
40y=680,
40y÷40=680÷40,
y=17;
(3)4m-2.5m=3,
1.5m=3,
1.5m÷1.5=3÷1.5,
m=2.
解方程.
5x+4x=4.5
50y-10y=680
4m-2.5m=3.
(1)5x+4x=4.5,
9x=4.5,
9x÷9=4.5÷9,
x=0.5;
(2)50y-10y=680,
40y=680,
40y÷40=680÷40,
y=17;
(3)4m-2.5m=3,
1.5m=3,
1.5m÷1.5=3÷1.5,
m=2.