Martha spent $38.45 on a new shirt and now has $17.71 in her pocket.

Which equation can be used to find how much money, x, she had in her pocket before buying the shirt? a. x−38.45=17.71
b. x + 38.45 = 17.71
c. x + 17.71 = 38.45
d, 17.71x = 38.45