book Maths Puzzle Numerical Ability

please solve for x and y
y=-2x+6
y=x

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book Other Question

please help me with this question.
solve bu any method.
-2x+2y=6
3x-y=3 A total of 40 brand X television sets and 80 brand Y television sets were purchased for a motel chain. If the price of each brand Y set was twice the price of each brand X set, wha