Question

Alguém sabe fazer, me ajudem

Answer 1

5)
AD/AF = AE/AG
1/0,8 = (1+x)/0,8+1,2
1/0,8 = (1+x)/2
0,8.(1+x) = 2.1
0,8+0,8x = 2
0,8x = 2 - 0,8
0,8x = 1,2
x = 1,2/0,8
x = 12/8
x = 3/2
x = 1,5

AE/AG = AC/AB
(1+1,5)/(0,8+1,2) = (2,5+y)/(0,8+1,2+1,6)
2,5/2 = (2,5+y)/3,6
2.(2,5+y) = 3,6.2,5
5+2y = 9
2y = 9-5
2y  = 4
y = 4/2
y = 2
AC = 1+x+y
AC = 1+1,5+2
AC = 3+1,5
AC = 4,5

6)
12,5/10 = 5/x
12,5x = 50
x = 50/12,5
x = 500/125
x = 4

4/y = 10/7,5
10y = 7,5 . 4
10y = 30
y = 30/10
y = 3