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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
$rightwards double arrow$ 20x = 120 - 60
$rightwards double arrow$ 20x = 60
$rightwards double arrow$ x = $60 over 20$
$rightwards double arrow$ x = 3

Final Answer:

Hence, Maryland purchase 3 month subscription for childen.

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