exam Maths Puzzle Numerical Ability

-2[3a-2(4a-1)]+2=2a+3-3 please help me solve this problem i am having alot of trouble. thanks much!

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exam Other Question

Simplify. Leave in Radical Form.

square root of 5n^5/4m^5
Find the nex three elements in each pattern.
216, 36,6, _________,___________,____________
4,5,9,14,23,_________,__________,____________
1/8, 1/10, 1/12, __________,___________,____________