Ihave g dollars in my bank account. i spend 1/3 of my money on an xbox and $20 on an xbox controller. how much
money do i have remaining in my account?

For this case we have:

G: Let the variable representing the amount of initial money in the account.

If you spend of G then we have:

Then spend $20, then we have:

Finally, the expression that represents the money left in the account is:

b

step-by-step explanation:

the equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, 4) and (x₂, y₂ ) = (3, - 5) ← 2 points on the line

m = = = - 3

with m = - 3 and (a, b) = (3, - 5), then

y - (- 5) = - 3(x - 3), that is

y + 5 = - 3(x - 3) → b