Tell whether the sequence is arithmetic. if it is, what is the common difference?
a. -6,2,10,18,
b. 1,2,4,8,

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

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step-by-step explanation: