exam Maths Puzzle Numerical Ability

solve:
3x^2-11x=4

Thanks in advance for your help

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exam Other Question

5x-(2x+2)=x+(3x-5)
Could you help me to solve this problem?

Thank you
Can you tell me tell me what properties these problems are?

6*(8+c)= (8+c)*6
(a+b)*1= a+b
14xy = 14yx