Maths-
General
Easy

Question

For Christmas, Maryland purchased subscriptions to Xbox Live for her four children. Each subscription costs $5 per month plus a $15 sign-up fee. If she received a bill for $120, for how many months did she purchase subscriptions for her children?

The correct answer is: x = 3


    • Hint:
    ○ Form the eqaution using given information.
    ○ Take variable value as any alphabet.
    ○ Take terms with cofficient at one side and without cofficients at another side.
    • Step by step explanation:
    ○ Given:
    Sign up fee per subscription = $15.
    Subscription cost per month = $5.
    Total subscription purchased = 4
    Total bill = $120.
    ○ Step 1:
    Let Maryland purchase membership for x months.
    So,
    Bill  for 1 month for 1 child  = sign up fee + monthly cost
    Bill  for 1 month for 1 child  =  15 + 5
    Bill  for x month for 1 child  =  15 + 5x
    Hence,
    Bill  for x month for 4 child  = ( 15 + 5x )  4
    Bill  for x month for 4 child  = ( 60 + 20x )
    ○ Step 2:
    ○ As total bill is $120.
    ∴ 60 + 20x = 120
    rightwards double arrow20x =  120 - 60
    rightwards double arrow20x = 60
    rightwards double arrowx = 60 over 20
    rightwards double arrowx = 3
    • Final Answer:
    Hence, Maryland purchase 3 month subscription for childen.

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