Solve the equation for the bold variable (h).

In order to solve for the bold variable, we follow the order of operations. In this case h = S/(2(pi)r) - r

S = 2(pi)r^2 + 2(pi)rh > Subtract 2(pi)r^2 from both sides

S - 2(pi)r^2 = 2(pi)rh > Divide by 2(pi)r

S/(2(pi)r) - r = h

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