Question

Aplicação das propriedades

Answer 1

1)x + y = 10
x = 10 - y
x/y = 2/3
10 - y /y = 2/3
2 y = 3 ( 10 - y )
2 y = -3  y  + 30
2 y + 3 y = 30
5 y = 30
y = 30/5
y = 6
x = 10 - y
x = 10 - 6
x = 4

2)x + y = 35
x = 35 - y
x/y = 3/4
35 - y /y = 3/4
3 y = 4(35 - y )
3 y = -4 y + 140
3 y + 4 y = 140
7 y = 140
y = 140/7
y = 20
x = 35 - y
x = 35 - 20
x = 15

3)A - G = 15
A = 15 + G
A/G = 9/4
15 + G / G = 9/4
9 G = 4 G + 60
9 G - 5 G = 60
4 G = 60
G = 60/4
G = 15
A = 15 + G 
A = 15 + 15
A = 30

4) W  -  Z = 25
W = 25 + Z
W/Z = 7/2
25 + Z / Z = 7/2
7 Z = 2(25 + Z )
7 Z = 2 Z + 50
7 Z - 2 Z = 50
5 Z = 50
Z = 50/5
Z = 10
W = 25 + Z
W = 25 + 10
W = 35