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x=1x=7

(a) The gradient of y=3x+7 is 3 and rearrange 2y–6x=8 to y=3x+4 to show the gradient of 2y–6x=8 is also(6÷2=) 3. Alternatively, choose a value for x and find y value for both lines (e.g. (0, 7) and (0, 4)...

1. notice that the denominators aren't the same2) To make them the same, multiply the numerator and denominator by 2 to get 6/12.3 now we can add the numerators together as the denominators are now the...

When answering this type of question, it is often easiest to break working out down into two big chunks, to keep everything organised.

Chunk One - Expanding and Simpli...