exam Maths Puzzle Numerical Ability

i want to know how do you do this problem having troble with math homework please help me!

x+3(2x-5)

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exam Other Question

How do you figure this out when y is isolated on both equations:
y=3x+1
y=6x-1

Thank you help finding values of x and y in parallelograms PQRS
PT=x+2,TR=y,QT=2x,TS=y+3