Madison's skateboard cost 10% more than tony's skateboard .madison's skateboard cost $83.

a. choose a variable to represent the unknown value in the situation. explain what the variable represents
b. write an equation that could be used to find the cost of tony's skateboard. explain your thinking

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation:

the answer is d

for problems like this theres an app, its photomath that explains the problem and gives the answer hope i