A picture 10cm long and 8cm wide is surrounded with a frame of area 63 square cm. Find the width of the frame

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:

hope this is what you were asking for!

step-by-step explanation:

yes

step-by-step explanation:

they have to be opposite and reciprocal of eachother.