Question

If the straight lines AB and CD intersect at a point O, then find the values of a, b and c.


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Answer 1

$(2a - 5) = (a + 35) \\ \\ 2a - a = 35 + 5 \\ \\ a = 40$

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$2a - 5 = c \\ \\ 2 \times 40 - 5 = c \\ \\ 80 - 5 = c \\ \\ c = 75$