The sum of twice a number and 7

is equal to the sum of the number and 3

2n+7 = n+3

n=-4

Step-by-step explanation:

the sum of twice a number and 7 is equal to the sum of the number and 3

2n+7 = n+3

subtract n from each side

n+7 = 3

subtract 7 from each side

n = 3-7

n = - 4