Question

решите уравнения: 1/5x+3=17−1/20x и 18,8/114=t/0,25 .

Answer 1

1)

1/5x + 3 = 17 - 1/20x

0,2x + 0,05x = 17 - 3

0,25x = 14

x = 56

Ответ: 56.

2)

18,8/114 = t/0,25

114t = 18,8 * 0,25

114t = 4,7

t = 47/1140

Ответ: 47/1140

Answer 2

$\frac{1}{5}x+3=17-\frac{1}{20}x\\\\\frac{1}{5}x+\frac{1}{20}x=14\\\\\frac{4+1}{20}x=14\\\\\frac{5}{20}x=14\\\\\frac{1}{4}x=14\\\\x=56$

$\frac{18,8}{\frac{1}{14} }=\frac{t}{0,25}\\\\t=\frac{18,8*0,25}{\frac{1}{14} }=18,8*0,25*14=65,8$