Question

calcule o valor de x nas proporções:
b) x-1/5 = x/3
c)x/6 = x+2
d)x-1/7 = 16/28
e)x=2/x-2 = 3/2
f)2 = 15-x/x
g)20/x-1 = 16/x
h)3/2 = x+3/x-1

Answer 1

B) x-1/5=x/3
3 (x-1)=5x
3x-3=5x
3x-5x=3
-2x=3
x=-3/2

C) x/6=x+2
x=6x+12
x-6x=12
-5x=12 (-1)
x=-12/5


D) x-1/7=16/28 ÷4
x-1/7=4/7
x-1=4
x=5

E)x-2/x-2=3/2
x-2/x-2=3/2
1=3/2
XEO


F) 2=15-x/2
2×2=15-x/2
4=15-x
x=15-4
x=11

G)20/x-1=16/x
20x=16 (x-1)
20x=16x-16
20x-16x=-16
4x=-16
x=-16/4
x=-4

H)3/2=x+3/x-1
3 (x-1)=2 (x+3)
3x-3=2x+6
3x-2x=6+3
x=9

BONS ESTUDOS ^^'