I need help mathematically

4 games

Step-by-step explanation:

well if you have $25 to spend, then you would take the 5.25 off which leaves you with 19.75 to spend. if each game cost 4 dollars, count up

4, 8, 12, 16, 20.

since 20 is too much, go down one. you can put 16 into 19. so he’d be able to play 4 games total plus an extra $3.75 to spare.

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18