1)7,8(-2,4а-1,3)-8,9(-1,9а+5,2)-3,58+1,81а= 2)-13,9(-8,4+5,2b)-10,7(6,8-9,5b)-29,37b-51=

Question

1)7,8(-2,4а-1,3)-8,9(-1,9а+5,2)-3,58+1,81а=
2)-13,9(-8,4+5,2b)-10,7(6,8-9,5b)-29,37b-51=

Answer 1

1)7,8(-2,4а-1,3)-8,9(-1,9а+5,2)-3,58+1,81а=-18,72a-10,14+16,91a-46,28-3,58+1,81a=-60

2)-13,9(-8,4+5,2b)-10,7(6,8-9,5b)-29,37b-51= 116,76-72,28b-72,76+101,65b-29,37b-51=-7