exam Maths Puzzle Numerical Ability

Can you please help me simplify this: 3y - (4y + 6x)

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exam Other Question

find the complement and supplement of 33 degrees Suppose you own a card shop. You buy one line of cards at a rate of 4 cards for $5. You plan to sell the cards at a rate of 3 cards for $5. How many cards must you sell in order to make a profit of $100.