The general solution of the first order D. E (2x +y )dx +(x - 2y )dy = 0 is :

step-by-step explanation:

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6 adults and 9 children went.

a + c = 15

12a + 9c = 153

12(6) + 9(9) = 153

72 + 81 = 153

think the answer is 30 degrees. if not than it is 20 degrees. not 100% sure. let me know if it was right.

gill russ