Calcule o valor de x nas proporções:
a) 2+x/4 = x/3
b) x-1/4 = x/6
c) x-1/6 = 9/12
d) 5-x/x+1 =6/2
a) 2+x/4 = x/3
b) x-1/4 = x/6
c) x-1/6 = 9/12
d) 5-x/x+1 =6/2
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A) 2 + X/4 = X/3
8 + X = 4X + 12
X - 4X = 12 - 8
-3X = 4
X = -4/3
B) X - 1/4 = X/6
12X - 3 = 2X
12X - 2X = 3
10X = 3
X = 3/10
C) X - 1/6 = 9/12
X - 1/6 = 3/4
X = 3/4 + 1/6
X = 11/12
D) 5 - X/X+1 = 6/2
X - X/X + 1 = 6/2
X - 1 + 1 = 3
X = 3
Espero ter ajudado !