-t + 2 = 12
What does t equal

-10

Step-by-step explanation:

-t + 2 = 12

subtract two from both sides -t + 2 (- 2) = 12 ( - 2)

simplify -t = 10

flip signs: t = -10

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: