a) 5x-40 = :{x= b) 6x+72 =0 : {x=c)8x-15 = 3x+55 :{x=d) x = 15...

a) 5x-40 =

5x = 40

x = 40/8

x = 5

b) 6x+72 =0

6x = -72

x = -72/6

x = 13

c)8x-15 = 3x+55

8x-3x = 55+15

5x = 70

x = 70/5

x = 14

d) x/2= 15/21⠀⠀

x/2 = 5/7

7x = 10

x = 10/7

❤️ Espero ter ajudado ❤️

21/04/22