book Maths Puzzle Numerical Ability

Thirty students bought pennants for the football game.Plain pennants cost $4 each and fancy ones cost $8 each.if the total bill was 168 how many students bought the fancy pennants

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book Other Question
The linear equation y = 5 graphs as a __________________ line.

Can you explain how I solve this please?

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Penalope how do u solve 7x+3y=2?