exam Maths Puzzle Numerical Ability

Can you please help me solve
5x-4y=20
3x+y=12

Thanks so much for the help!!! = )

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exam Other Question

A=50DEGREE,B=30DEG, c=9

solve each triangle described below. round measures of sides and angles to the nearest tenth. add and express in simplest form

6/3x-2 + 3/2x

Thanks