exam Maths Puzzle Numerical Ability

can you help me with this graphing problem

5x+4y=7
x-3y=9

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exam Other Question

i would like to know how to sovle a equation 3y-2(y-1)/=-1 can u show me the processes to get the correct answer. Please help me with this problem, I'm lost as to how to solve it. I know factoring is involved but after that, I'm stuck.

x+5 + (x^2+10x+25 10x)
_____ __________