Question

determine a solução da seguinte equação: 7x+4 - x=3x-5 

                                                                                  5            2 

                                                                                  

Answer 1

 7x+4 - x= 3x-5   mmc = 10

    5             2 

 

2(7x+4) -10x  =  5(3x - 5)

 

14x + 8 - 10 = 15x - 25

 

15x - 14x =8 -10 +25

 

x = 23

 

e fui.

Answer 2

7x+4 -x/5 = 3x-5/2

mmc (5 e 2) = 10

(7x+4)/1 - x/5 = 3x/1 - 5/2

10:1.(7x+4) - 10:5.x = 10:1.3x - 10:2.5

70x+40 - 2x = 30x - 25

70x - 2x - 30x = -25 -40

38x = -65

x = -65/38