exam Maths Puzzle Numerical Ability

solve the system by addition 2x + 4y = 3
4x -2y =1

Thank you in advance

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exam Other Question

please help me simplify if possible and if it cant be simplified say "not possible" (A) sqrt(3) (sqrt (6) - 2 sqrt(3)) (A)____________
(B) sqrt(18) - sqrt(3) / sqrt (6) (B)____________
HI!
please help me with finding this equation

find the equation for the line parallel to 2x-3y+6=0, with the same y intercept as y=7x-1