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15-11-2017
Mathematics

contestada

Jacob is using this rule.
''Start with a number, divide it by 2 and then add 3. Write down the result.''
a) What is the result when Jacob starts with 8?
b) What number did Jacob start with when the result is 5?

Respuesta :

15-11-2017

a) 8 : 2 + 3 = 7
b) x/2 + 3 = 5
x = (5-3) * 2
x = 2 * 2 = 4

a) 7
b) 4

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