Question

Efetue:
A) 3X/3=100/50
B) 20/2=X+1/2

Answer 1

a)
3x  =  100
 3         50

multiplicar em cruz

3x . 50  =  100 .  3

150x = 300

x = 300
      150

x = 2


b) 

20   =   x + 1
 2            2

multiplicar em cruz

2 (x + 1)  =  2 (20)

2x + 2 = 40

2x = 40 - 2

2x = 38

x = 38/2

x = 19

Answer 2

a) 3x /3 = 100/50
     x = 10/5
x =2

b) 20/2 = (x+1)/2
(2.20)/2 = x+1
20 = x+1
20-1 =x
x = 19