Question

решите уравнение 1)  7 7 /30 -( 5 11/30-y) = 3 19/30 

Answer 1

7 7/30- (5 11/30 -у)= 3 19/30
 7  7/30 -3 19/30= 5 11/30 -у
1) 7 7/30- 3 19/30 = 217/30- 109/30=108/30=3  18/30= 3 3/5
2) у=5 11/30 - 3  3 /5 = 161/30-108/30=53/30=1 23/30