Question

encontre o valor de x na equação :
a) sabendo que x+y=7,calcule
x/y =12/9

b) x+y=10 , calcule x/16 = y/64

c) x+y+z=144, calcule x/4= y/6= z/8

Answer 1

a) x +y = 7 ∴ x +y /x = 12 +9/12∴ 7/x = 21/12∴ 21x = 84∴ x= 84/21= 4 y = 7-4=3 b) x+y= 10 x+ y /16+64= x/16∴ 10/80=x/16∴ x = 160/80∴ x= 2 y = 10 - 2=8 c) x/4=y/6=z/8 x+y+z / 4+6+8 = x/4∴ 144/18=x/4∴ 8/1=x/4∴x =32 8/1=y/6 ∴ y= 48 8/1=z/8∴ z = 64