Question

1.Calcule o valor de x

a) $\frac{5x}{2}$ = $\frac{10}{2}$

b) $\frac{4x}{8} }$ = $\frac{10}{2}$

Answer 1

a)

5x      =    10
------        -------
  2             2

 5x    =  5
-----
  2

5x = 2.5
5x = 10
x = 10/5
x = 2

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
b)


 4x   =   10
-----       -----
  8           2

 4x     =   5
------
  8

4x = 8.5
4x = 40
x = 40/4
x = 10