Clearly angle PSQ =RQS so angle psQ =45 now angle psq + y = 90 45. + y = 90 y. = 45 LET the point be M where 60 is formed and O be the point where X is formednow in triangle MOQ 60 + 45 + angle MOQ = 180 anlge moq. = 180- 105 angle moq. = 45 now angle moq + X = 180. (linear PAIR angles) 45. + X =180 X. =180- 45 X. = 135 hope it. helps.
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