exam Maths Puzzle Numerical Ability

If the sum of two numbers is 134, and the larger number is 10 less than triple of the smaller number. What are these two numbers.

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This is the problem.

y=x-1
4x-y=19

This is what I tried.

4x-x-1=19
3x-1=19
3x=20
x=6 and 2/3
Thank you very much! There is a question close to this on the board but it is slightly different. Can you please help me.

Thank you.

Solve using the quadratic formula:

3x^2-2x=15x-10