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90 + 65 = 155
360 - 155 = 205 = 2a + 3a = 5a
205 : 5 = 41 = a
2a = 41 x 2 = 82
3a = 41 x 3 = 123
2) 360 = 90 + 35 + c + d + e + f
c = 90 - 35 = 55
d = 35
f = 90