Question

An orange has 20 fewer calories than a banana. If 7 bananas have the same number of calories as 9 oranges how many calories are in a banana?

Answer 1

7B = 9B - 180

REARRANGE THE VARIABLE ON ONE SIDE AND NUMBER ON THE OTHER SIDE.

we get,

180 = 9B -7B

180 = 2B

therefore B = 180/2

= 90 CALORIES IS THE ANSWER