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(i) x = 3, y = 2
(ii) x = 25
Step-by-step explanation:
(i) ABCD is a parallelogram.
∴ Diagonals AC and BD bisect each other.
∴ 5y + 1 = 6y - 1 => y = 2
And 3x -1 = 2(x + 1) => x = 3
(ii) In ΔABC, sum of the interior angles is 180°
∴ (x + 10) + (3x + 5) + (2x + 15) = 180
=> 6x = 180 - 30 = 150
∴ x = 25
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