exam Maths Puzzle Numerical Ability

Can you please help me work out this equation:

2(5x+2)= 10x

Thank you so much.
=)

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exam Other Question

Solve for x

x^2+4x+4=7

Thanks in advance.
Solve the compound inequality. Other than 0 use interval notation to express the solution set and graph the solution set on a number line.

-35<-5x-5<-15