exam Maths Puzzle Numerical Ability

angle 11=4x, and angle 12=2x-6 what is the measuement of angle 11 and angle 12

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exam Other Question

Solve. 5(x � 5) + 8x = 9x � 25 i dont understand how to do this problem!! it involves letters and numbers being the exponent can someone help me out?? a^2m b^m+1 /(over) a^m b