Question

Eu Preciso Das Repostas (Com As Contas!) Dessa Questão:

Determine O Valor De X Nas Proporções.

X/9=3/1
R:

Y/2=15/10
R:

5/Y=3/6
R:

7/8=14/A
R:

T/9=2/7
R:

10/M=1/3
R:

1/7=X/8
R:

11/5=X/10
R:

45/9=15/X
R:

Z/100=210/600
R:

Answer 1

multiplique em cruz  em todos os casos
x/9 = 3/1
x = 9 * 3 = 27 ****

y/2 = 15/10  ou  3/2
y/2 = 3/2
2y = 3 * 2  = 6
y = 6/2 = 3 ****

5/y = 3/6 = ou 1/2
5/y = 1/2
y = 2 * 5
y = 10 ***

7/8 = 14/a
7a = 14 * 8
7a = 112
a = 112/7 = 16 ***

t/9 = 2/7
7t = 9 * 2
7T = 18
T = 18/7 ****

10/m = 1/3
m = 10 * 3 
m = 30****

1/7 = x/8
7x = 1 * 8
7x = 8
x = 8/7 ****

11/5 = x/10
5x = 10 * 11
5x = 110
x = 110/5 =22 ****

45/9 = 15/x
45x = 15 * 9
45x =135
x = 135/45 = 3 *****

z/100 = 210/600
600z = 100 * 210
600z = 21000
z = 21000/600 = 210/6 = 35/1****