welchbrianna61 welchbrianna61

15-09-2018
Mathematics

contestada

the sum of twice a number and 3 is equal to the sum of the number and 9

Respuesta :

15-09-2018

n - the number

The equation:

2n + 3 = n + 9 |-3

2n = n + 6 |-n

n = 6

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