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t = 3n

Step-by-step explanation:

t is the variable you're looking for so it should be isolated on one side of the equation. Then, you look at the pattern that would fill in the graph. It's the shape × 3 = t.

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: