exam Maths Puzzle Numerical Ability

Solve and check for X :

[5/(x+6)]+[2/(x^2+7x+6)]=[3/(x+1)]

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exam Other Question

I was wondering how you solvea system of euqations problem. The problem is 8x+3y=26
2x=y-4
Thanks fo much for you help = ) Solve 2/3(6x+30)=x + 5(x+4)-2x