can someone help me with this math problem?

Question

Write a linear equation to model the situation. You borrow $70 from
your brother. To repay the loan, you pay him $7 per week. Use w to
denote the number of weeks and y as the balance on the loan.

Answer 1

y = 7w - 70

or, alternatively, y = -7w +70 (if you want to express the balance as a positive number)

y, the balance of the loan, starts at -70 (or +70).

Then, every week, you add (or subtract) 7 dollars to the balance.

Answer 2

y=70-7w

The balance starts at $70. It decreases by $7 per week, so this is modeled as 7w to denote the amount paid on the loan after w weeks, and subtracted from the original balance. The loan should be paid after w=10 weeks.

Answer 3

First of all, you must look at your variables, constants, and coefficients.

Your dependent variable is y and your independent variable is w. The dependent variable is the variable that is the output of the equation. The independent variable is the input.

Since you are paying 7 dollars per week, you have to multiply that by w, since it is a rate, called a unit rate because it is compared to a quantity of 1. Then, you subtract 7w from 70 because you are trying to find the balance on the loan.

The resulting equation is:
y=70-7w

Answer 4

70-7*w=y

Answer 5

y = -7w + 70