Question

Susan's math teacher assigned x homework problems on Monday. On Tuesday, she assigned 12 more problems. Over the two days, a total of 20 homework problems were assigned. Which equation could be used to find x, the number of problems assigned on Monday?
A.
x - 12 = 20
B.
20 + x = 12
C.
12x = 20
D.
x + 12 = 20

Answer 1

D. lets see what you know, you have 20 problems in 2 days, they did not say the amount of problems were equal on both days, so she had x amount on monday and on tuesday she had 12 more to find the total just add 12 + x = 20
hope I helped

Answer 2

the answer is D because you are trying to find Mondays and yoyu know tuesday and the total already.