exam Maths Puzzle Numerical Ability

Simplify by combining like terms

2 sqrt (5x) + 5 sqrt (5x) - sqrt (5x)

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exam Other Question

write an equation for: 4 consecutive numbers, the sum of the first 3 numbers is equal to 54 more than the 4th number The length of a rectsngle is fixed at 14cm. What widths will make the perimeter greater than 86cm? the width must be bigger than ___?
Will someone help me with this I cannot do word problems at all!!!