exam Maths Puzzle Numerical Ability

I need help solving problems with equations that contain fractions.

my problem is 1/2(x+12)= 1/3x

can you help me?

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exam Other Question

Find the equation of the line, write your answer in slope intercept.

The line goes (1,4) and is parellel to x-2y=6

I have come up with the slope, I believe it is (1/2, -3)Is this correct?
Ann and becky spend $70.00 on dinner. if they want to leave a 15 % ttip,find the amount of tip they should leave.