book Maths Puzzle Numerical Ability

find the solution of each equation for x=-3,0,and 2.

the problems are
x-2y=3 and y=-x-1.5

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book Other Question

1) Find a number such that 6 more than one-half the number is two-thirds the number I seem to be having issues with the equations with fractions in them. I'm getting frustrated because just when I think I have it down, I end up with the wrong answer. If you can