exam Maths Puzzle Numerical Ability

Remove the parentheses and simplify.
9y - (-4y - 2x)

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exam Other Question

Please help.

Solve the system by substitution.

3x - y = -7
x + y = -9

Thanks
JMS ms. jones has been given a loan of $2500 for 1 year. if the interest charged is $275, what is the interest rate on the loan?