exam Maths Puzzle Numerical Ability

It is known that the demand for coffee is linearly related to the price per pound p, measured in dollars, at which the coffee is sold. This linear function D(p) has the properties

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exam Other Question

Multiply the fractions. Be sure to simplify completely.

2x^2-x-3 3x^2-11x-20
--------- X ------------- =
3x^2+7x+4 4x^2-9 Can you show me how to simplify or solve for "x" in the following equations?

3(x+2)=-2(x+4)

2(x+1)=4-3(2x+1)

2(x+1)-3(x+7)=2

-3.6x+3.1=3(5.2-1.2x)

I would appreciate the help! Thank You =)