Question

Y+3/2-(1-y)=3,5
1/5(y-3)-2/3(y-3/5)+1/3=2/5-1/3(2y-3)
2y+4:4=1/2y+1
y-2:3+1/15-2y-5:3=8-4y:5
y-5/2+(2y+3 :5)+1/3=y+7:15+y/2

dzieki prosze o jak najszybsze rozwiązanie tego zadania :))

to zadanie 16 na stronie 73 zbiór zadań klasa 1 gimnazjum

Answer 1

Y+3/2-(1-y)=3,5
y+3/2-1+y =35/10 | *10
10y + 15 -10 +10y = 35
10y + 5 +10y = 35
20 y = 35 - 5
20y = 30 | : 20
y = 1,5

1/5(y-3)-2/3(y-3/5)+1/3=2/5-1/3(2y-3)
1/5y - 3/5 -2/3y + 6/15 + 1/3 = 2/5 - 2/3 y +1 | *15
3y -9 - 10y + 6 + 5 = 6 - 10y +15
3y - 10 y + 10y = 21 + 9 - 11
3y = 19
y = 6 1/3

2y+4:4=1/2y+1
2y + 4 * 1/4 = 1/2y +1
2y + 1 = 1/2y + 1
2y - 1/2 y = 1 -1
1,5y = 0 |: 1,5
y = 0

y-2:3+1/15-2y-5:3=8-4y:5
y - 2 * 1/3 + 1/15 -2y - 5* 1/3 = 8 - 4y *1/5
y - 2/3 + 1/15 -2y - 5/3 = 8 - 4/5y |*15
15y - 10 + 1 - 2y -25 = 8- 12y
13y +12y = 8 +34
25y = 44 | :25
y= 1 19/44