exam Maths Puzzle Numerical Ability

Insert grouping symbols in each expression to make a true equation.
7-2x5-3+2=12

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exam Other Question

2 - 4x + 7x + 8 < 6x - 5x Solve each of the following systems by using either addition or substitution (kind of like in Example 5 on p 715). If a unique solution does not exist, state whether the system is