book Maths Puzzle Numerical Ability

2/3 (3/2) = 1
7x + 2y= 2y + 7x

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book Other Question

Simplify: 4x>2+12x+xy+3y divided by x>3+27 The linear equation y = 5 graphs as a __________________ line.

Can you explain how I solve this please?

Thanks
Penalope