Cody was 165 cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year how tall was cody on the first day of school last year?

Solution:

Let X = height of Cody on the first day of school last year

Given: Y= height of Cody on the first day of school year = 165 cm

10%(X)+X=Y

.10(X)+X=165

1.10X=165

X=165/1.1

X= 150 cm = height of Cody on the first day of school last year

150

Step-by-step explanation:

i did the khan academy and the correct answer was 150 cm ;-;

exa:

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3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.