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Olin [163]
3 years ago
6

Isandro and Yvette each have a calculator. Yvette starts at 100 and subtracts 7 each time. Isandro on the other hand, starts at

zero and adds 3 each time. If they press the keys at the same time, will their displays ever show the same number? if so, what is the number?
Mathematics
1 answer:
LenaWriter [7]3 years ago
8 0
Yvette = 100-7x
Isandro = 0+3x

0+3x = 100 - 7x
0+3x+7x = 100 - 7x +7x
10x = 100
x = 10
So on the 10th time they have the same number, which is 30.
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