book Maths Puzzle Numerical Ability

Which ordered pair is the solution of the following system of equations?
(
( 2x+ 3y = 7
( x+ y = 3
(

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Please show me how to do this.

sqrt20/5 - 1/sqrt5

Only the 20 in the numerator is in the sqrt in the first half and only the 5 in the denominator is in the sqrt in the second half.

Thanks Solve x+3=|2x|by graphing f(x)= x+3 and g(x)= |2x|.