If 7x + 3 = 17, what is the value of 7x - 3?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis.y = 7ex, y = 7e^-x, x = 1; about the y-axis

If a and −a are numbers on the number line, which expression must give the distance between them? a) 0 b) a c) |2a| d) |a|