Question

Teorema de Tales, preciso com as contas​

Answer 1

A)

3--2

4--X

multiplica cruzado, vai ficar:

3X=8

X=8/3

X=2,666...

B)

4----X

12--21

multiplica cruzado e fica:

4×21=12X

84=12X

X=84/12

X=7

C)

9--18

X--4

multiplica cruzado e fica:

9×4=18X

36= 18X

X:36/18

X=2

D)

8----12

2X-6----X+1

multiplica cruzado:

(2X-6)×12 = 8×(X+1)

24X-72 = 8X+8

24X-8X=8+72

16X=80

X= 80/16

X=5

Answer 2

Resposta:

a: 2 = 3 = 2. X = 3. 4

4 x X = 12÷2

X = 6

b: 4 = X = 12. X = 4. 21

12 21 X = 48÷ 12

X = 7

c: 9 = X = 18. X = 9. 4

18 4 X = 36÷ 18

X = 2