Write an equation using the variable x to represent any unknown quantity. Do not solve the equation.Bob is saving to buy a car. The total amount that he needs is $9000. The amount that he has saved so far is $7000. Write an equation for which the solution is the amount that Bob needs.
A. 9000 - x = 7000
B. 7000 + x = 9000
C. 9000 + x = 7000
D. 7000 - x = 9000
Answer: B
Mathematics
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