Question

1,2,3 pls repede dau coroana

Answer 1

1.
1/3(x+2)=15/2 • 19/3
x/3 + 2/3 = 285/6
2x+4=285
2x=281 => x=140,5

2.
a) 20% este 20/100 sau 1/5
1/5 • 2750 = 550
b) x/5 = 550 => x=2750

3.
15 m^3 _________1000 kg
25 m^3 _________ x
x=(25•1000)/15=25000/15=1666,(6) kg