exam Maths Puzzle Numerical Ability

The question is Sara takes 2 friends bread, she gives Judy 3times the aomunt then Jane. The total amount of loafs are 12. How many does judy get?

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√2(9 √5 - 7 √9)=? I am finding it very hard to solve this type of problem. Can you help me out? Solve the following equation for x:

5(x - 2)^2 = 3

Express your answer(s) in both "simplified radical" form, and in decimal form.

I came up with x=2+or-sqrt(3/5). Could someone please check this one for me. Thanks.