The answer to the question is y=-4x+23
Download Photomath it helps and it gives you step by step or
Simple actually. The 1000 is the starting price the -20 is the losing of value per week and the w stands for the number of weeks.
3x -1/2y = -7/2
x = -2y + 1
3 (-2y + 1) -1/2y = -7/2
-6y +3 -1/2y = -7/2
-13/2y = -13/2
y = 1
x = -2(1) + 1
x = -1
Answer = (-1, 1)
Where is the rest of the question??
