Question

Aflati termenul necunoscut din urmatoarele proportional a) x supra5 =7 supra 2 b) 4 supra x = 9 supra 5 c) 10 supra 5 = x supra 10 d) 4 supra 14 = 1supra x

Answer 1

a) x/5=7/2. b) 4/x=9/5
2x=7×5. 9x=5×4
2x=35. 9x=20
x=35:2. x=20:9
x=17,5 x=2,(2) sau 20 supra 9
Sau 35 supra 2

c) 10/5=x/10
5x=10×10
5x=100
x=100:5
x=20
d) 4/14=1/x
4x=14|:2
2x=7
x=7:2
x=3,5 sau 7 supra 2

Answer 2

a)
x/5=7/2 => x=(7×5):2 =35:2= 17,5

b) 4/x=9/5 => x= (5×4):9= 20/9.

c) 10/5=x/10 => x=(10×10):5= 100:5=20

d)4/14=1/x => x= 14/4= 3,5.

succes!