book Maths Puzzle Numerical Ability

Please show how to do this problem

3x+6=2x-5 and

8x-6=-4+3

Thanks J

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book Other Question

Solve for "x"

x^2/3=x/5

I tried to solve but it doesnt check:

x^2/3=x/5
5x^2=3x
? Nancy is 6 inches taller than her sister pansy. pansy is 1 foot shorter than their brother clancy. pansy and nancy both weigh less than clancy, by a total of 20 pounds. the sum of