exam Maths Puzzle Numerical Ability

simplify by combining like terms on the radical equations

/63 - 2/(28) + 5/(7)

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exam Other Question

if you double a number ant then add 12 you get one-half of the original number. what is the original number? Use substitution to solve each system of equations. If the system does not have exactly one solution, state whether it has no solution or infinitely many solutions.

-0.3x+