exam Maths Puzzle Numerical Ability

Solve the system by substitution.
x + y = 12
y = 2x

Solve the system by addition.
5x - 3y = 13
4x - 3y = 11

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exam Other Question

A farmer's market has purchased 60 pumpkins for a total cost of $240.00. They expect that 20% of these pumpkins will remain unsold and that another eight will have to be sold at c How do I simplify 3n-4 divided by 4-3n and how do I simplify 6y cubed + 12y over 9y cubed + 18y squared