Tia takes $50 from her bank account to pay for bus fare for the month. She does this each month for 7 months in a row. Which equ
ation models this situation and represents the change it causes in Tia's bank balance?
(-$50) + 7 =543
(-550) * 7 =-$350
А
B
С
$50 (-7) = $350
D
(-850) - 7 =-557
