Решите уравнение. у+1/4=4/5-3/10; (4/5-х)+13/20=7/10; - вопрос №82488991445310451320710232913 от Panda511111 22.07.2020 06:39

Question

Математика: Решите уравнение. у+1/4=4/5-3/10; (4/5-х)+13/20=7/10; 2/3-(2/9+х)=1/3.

Panda511111 · Answer

1) y + 1/4 = 4/5 - 3/10
y + 0.25 = 0.8 - 0.3
y + 0.25 = 0.5
y = 0.25

2) (4/5 - x) + 13/20 = 7/10
0.8 - x + 0.65 = 0.7
0.8 - x = 0.05
x = 0.75

3) 2/3 - (2/9 + x) = 1/3
2/3 - 2/9 - x = 1/3
6/9 - 2/9 - x = 3/9
4/9 - x = 3/9
x = 1/9