Question

решите уравнение 15/2 * х -3 *(5 + 11/18 * х) = 19

Answer 1

15/2 * х -3 *(5 + 11/18 * х) = 19

15/2*х-15-33/18*х=19

15/2*х-33/18*х=19+15=34

15*9*х-33*х=34*18

135*х-33*х=612

102*х=612

х=612:102

х=6