Four times a number is three times the difference of that number and one

the number is -3

Step-by-step explanation:

Four times a number is three times the difference of that number and one

Let the number be x. Four times the number means 4×x = 4x

three times the difference of that number and one. This means

Difference of the number and one is (x-1). Three times the difference of the number and one would be 3(x-)

Four times a number = three times the difference of that number and one. Therefore,

4x = 3(x-1)

Opening the bracket

4x = 3x -3

4x-3x = -3

x =-3

Check

4×-3 =3(-3-1)

-12 = -3×4

-12 = -12

So the number is -3

answer: i don't understand. what are the options

step-by-step explanation:

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).