Question

-7(-9+5n)=-31-9n (please help me)

Answer 1

n = 4/3

Explanation:

-7(-9+5n) = 31-9n

63-35n = 31-9n

32-35n = -9n

32 = 24n

32/24 = 24n/24

4/3 = n

Answer 2

3 8/13 = n

Explanation:

-7(-9+5n)=-31-9n

distribute

-7 * -9 - 7*5n = -31 - 9n

63-35n = -31-9n

add 35n to each side

63-35n +35n = -31-9n+35n

63=-31 +26n

add 31 to each side

63+31 = -31+31 + 26n

94 = 26n

divide by 26

94/26 = n

divide top and bottom by 2

47/13 = n

change to a mixed number

3 8/13 = n