Johnny’s has a total of 160 minutes to cut the grass, play basketball, and do homework. He spent x minutes doing homework, 3(x+4) minutes cutting the grass, and 40 minutes playing basketball. How much time did Johnny spend doing homework?

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.