Question

Помогите решить 2 примера по математике
1) 10,8d-(7,1d-5(1,9d-7(8,2d-6)))
2)(3,1t-1,4(5-2,3t))-(29t+4,1(8-1,5t)))

Answer 1

1) 10,8d-(7.1d-5(1.9d-57.4d+42))=10.8d-7.1d+9.5d-287+210= 13.2d-77
2) (3.1t-7+3.22t)-(29t+32.8-6.15t)= 3.1t-7+3.22t-29t-32.8+6.15t= -22.97t-39.8