exam Maths Puzzle Numerical Ability

n + 5 3/10= 8 1/10

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exam Other Question

Can you help me with this problem please i do not understand it.

Simplify and combine like radicals. all variables represent positive numbers

square root 98 - square root 50 - square root 72

thank you
julie
WHAT is the answer? square root of 32 times the square root of 144.