13 (3+2x) - 1=10 solve for x.

a. x=6 2/3

b. x=15

c. x=20

d. x=5

13 (3+2x) - 1=10

Distributed property to remove parenthesis

39+26x-1=10

Subtract 39 by - 1

38+26x=10

26x=10-38

Subtract 38 both sides

26x = - 28

Divide 26 both sides

X = - 28/26

Answer is

X = - 14/13

The option answers does not satify to make equation true.