book Maths Puzzle Numerical Ability

How solve the system 4x-6y=4 and x+5y=14 using Cramer's rule?

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Hi there!

I have asked this question a few times today, but no response. Could someone please help me solve this problem?
I am having trouble finding the LCD(new denominator) a
Stating the slope and y-intercept of the graph on this equation:

exa.
5x - 4y = 8

exa.
2/3x + 4/7y = 1