book Maths Puzzle Numerical Ability

I am trying to help a friend with her homework, but we have both hit a brick wall, can someone send us the process to solve the following equation?
2/5(10x+25)=-10-4(x+3)
Thank you so much for your help.
Patty & Sunshine

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book Other Question

Any help with this problem would be greatly appreciated



Rationalize the denominator:
2____
√[6] - √[5]



Thanks
we need an example of primefactorization.