How do you solve 4x-7x=13

13=-3x

3x=-13

x=-13/3=-4 1/3

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.