exam Maths Puzzle Numerical Ability

2r-6/6+2/6=-r/3

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What is the equation of a line that passes through the point (14,-9)and has a slope of Zero? translate into a algebraic equations :

1) A girl buys three apples and seven oranges for $4.56. If an orange costs $0.28 more than an apple, how much does each fruit cost?