exam
Maths Puzzle
Numerical Ability
Mario has 55 CDs. Write an expression to represent the total number of CDs he will have after 18 months if he buys x CDs per month.
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exam Other Question
How can I simplfy exponents?
3/7x + 5/9y = 27
1/9x + 2/7y = 7
Solve each system by the addition method
can someone who understands this help thank you