Ответы и объяснения

2013-11-25T09:32:32+00:00
7b-6b-29=374
1b-29=374
1b=374+29
1b=403
b=403:1
b=403


8(112-5x)=816
896-40x=816
40x=896-816
40x=80
x=80:40
x=2


13x+14x=408
27x=408
x=408:27
x=15,1

2013-11-25T09:36:19+00:00
(7-6)в - 29 = 374
1b - 29 = 374
1b = 374 + 29
1b = 403
b = 403:1
b = 403

8(112-5x)=816
8 x 112 - 5x = 816
8 x 112 = 896
896 - 5x = 816
5x = 896 - 816
5x = 80
x = 16

13x + 14x = 408
(13 + 14)x = 408
27x = 408
x = 408 / 27
x = 15, 11111111111111