问题
解答题
解方程(4%)
7.9-4.5X=7
X+0.6-0.27=18.
答案
(1)7.9-4.5x=7,
7.9-4.5x+4.5x-7=7+4.5x-7,
0.9=4.5x,
4.5x=0.9,
4.5x÷4.5=0.9÷4.5,
x=0.2,
(2)x+0.6-0.27=18,
x+0.33=18,
x+0.33-0.33=18-0.33,
x=17.67.
解方程(4%)
7.9-4.5X=7
X+0.6-0.27=18.
(1)7.9-4.5x=7,
7.9-4.5x+4.5x-7=7+4.5x-7,
0.9=4.5x,
4.5x=0.9,
4.5x÷4.5=0.9÷4.5,
x=0.2,
(2)x+0.6-0.27=18,
x+0.33=18,
x+0.33-0.33=18-0.33,
x=17.67.