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20 POINTS

Step-by-step explanation:

X squared over 6

+

2x cubed over 3

x^2/6 + 2x^3/3

Step-by-step explanation:

I used (m)athway to simplify the expression

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:

the answer to this is a. a^2 + b^2 = c^2