Question

3/8+2/15+х=90 с дробями

Answer 1

3/8 + 2/15 + x = 90
x = 90 - 3/8 - 2/15
x = 90 - 45/120 - 16/120
x = 90 - 61/120
x = 89 целых  59/120

Answer 2

45/120+16/120+х=90
61/120+х=90
х=90-61/120
х=89ц59/120