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Margaret [11]
3 years ago
9

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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