exam Maths Puzzle Numerical Ability

please help solve the following.

6m+11=25-m

x^2+5x+6=0

3x^2+5x+1=0

please could you show working out.

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exam Other Question

can some one please help, i do not knwo how to figure this out. thanks
76. x^3-1/x^2+1 divided by 9x^2+9x+9/x^2-x
13x-4(2x+5)=15