Answer:
Step-by-step explanation:
A. Given
 T = 0.05x +35 . . . . Terri's cost of operating a craft booth
 D = 0.03x +55 . . . . Donna's cost of operating a craft boot
 T = D
where x is the dollar amount of sales.
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B. Solution
Subtracting the equation for D from that of T, we get ...
 T - D = 0
 (0.05x +35) -(0.03x +55) = 0 = 0.02x -20
 0 = x -1000 . . . . . divide by 0.02
 x = 1000
 T = D = 0.05(1000) +35 = 85
 (x, T) = (x, D) = (1000, 85)
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C. Meaning
According to the given definitions of the variables, each booth pays a total of $85 in fees for sales of $1000.