Expand and simplify: (10-x)/2 = 2x - 6
This is a typical example of a 3 mark question on a GCSE higher paper. The first mark would be awarded for multiplying both sides of the equation by 2, and then expanding the brackets:10 - x =2(2x-6)10 - x = 4x - 12The other two marks would be awarded for isolating x:-5x=-22x=22/5=4.4
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If 3y-1=2y+4 then what does y=?
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Simplify (8x^2 + 36x)/(2x + 9) and explain why it is an even expression.