exam Maths Puzzle Numerical Ability

I need help with the steps in solving this problem. It says solve by substitution 3x-5y=41, x-y=11

Thank you,
Brina

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exam Other Question

Please help me solve 2x+y=5 so I can graph it I have an idea but not sure. What equation represents the given after they have been cleared of fractions?
2x+16/11 + y-1/3 =3
3x+3/4 - 2y-3/5 = 2