Question

Sendo a\\ b\\ c, Calcule o valor de x


Ajude pfv

Answer 1

Olá!

a)

x ---- 2
9 --- 10

10x = 18

x = 18 / 10

x = 1,8

b)

x ----- (x + 4)
15 ------ 20 

20x = 15(x + 4)

20x = 15x + 60

20x - 15x = 60

5x = 60

x = 60 / 5

x = 12

Answer 2

a) x = 2    multiplique cruzado        b)x = x+4 multiplique cruzado
    9   10                                                15=20
10x=18                                                 20x=15(x+4)
x=18/10 simplifique por 2                   20x=15x+60
x=9/5                                                      20x-15x=60
                                                                    5x=60
                                                                     x=60/5
                                                                       x=12