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3 years ago

I am thinking of a number. when it is increasd by 7, it equals 21. what is my number

Mathematics

2 answers:

olga55 [171]3 years ago

8 0

Let the number be x;
x+7=21
Subtracting 7 from each side,
x+7-7=21-7
x=14

andrey2020 [161]3 years ago

6 0

If X is increased by 7 to make 21
X + 7 = 21
then rearrange the equation to get X
X = 21-7
X = 14(b)

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