exam Maths Puzzle Numerical Ability

Solve each of the following systems by substitution.
4x-12y=5
-x+3y=-1

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exam Other Question

John currently has enough money to buy 50 toy cars. If the cost of each car was 10 cents less, John could buy 5 more cars. How much money does John have to spend on the toy cars?

a. $40
b. $45
c. $55
d. $75 A man is 41 years old and his son is 9. In how many years will the father be three times as old as his son?