问题
解答题
解下列方程.
|
答案
(1)x-55%=18,
x-0.55+0.55=18+0.55,
x=18.55.
(2)13%x-19=17,
0.13x-19+19=17+19,
0.13x=36.
0.13x÷0.13=36÷0.13,
x=276
.12 13
(3)(2.5+240%)x=14.7, 4.9x=14.7, 4.9x÷4.9=14.7÷4.9, x=3. |
解下列方程.
|
(1)x-55%=18,
x-0.55+0.55=18+0.55,
x=18.55.
(2)13%x-19=17,
0.13x-19+19=17+19,
0.13x=36.
0.13x÷0.13=36÷0.13,
x=276
.12 13
(3)(2.5+240%)x=14.7, 4.9x=14.7, 4.9x÷4.9=14.7÷4.9, x=3. |