book Maths Puzzle Numerical Ability

Solve each system by the addition method
x + y = 13
22x + 36y = 356

Solve each system by the addition method. Determine whether the equations are independent, dependent, or

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book Other Question

Factor the equation

10(y+7)-x(y+7)

thank you Jenny has 175 coins in a jar. They consist of nickels and dimes only. The total value of the 175 coins is $11.90. How many nickels and dimes are there in Jenny's jar?