Question

Решите уравнения:
28*(х+5)=224
144:(х-3)=36
(х+67):18=4
(4n+3n)*11=154
(19n-6n):4=26
(17n-8n)*13=354

Answer 1

28х-84=0
28х+140-224=0
28х-84=0
х=84/28=3

144/х-3-36=0

х/18+67/18-4=0
х/18+3,72-4=0
х/18-0,27=0
х=0,27*18=5

7н*11-154=0
77н-154=0
н=154/77=2

13н/4-26=0
3,25н-26=0
н=26/3,25=8

9н*13-354=0
117н-354=0
н=354/117=3,02

Answer 2

28*(х+5)=224
28х+140=224
28х=224-140
28х=84
х=84/28
х=3

144:(х-3)=36
144=36(х-3)
144=36х-108
144+108=36х
252=36х
х=252/36
х=7

(х+67):18=4
18*4=х+67
72=х+67
72-67=х
х=5

(4n+3n)*11=154
44n+33n=154
77n=154
n=154/77
n=2

(19n-6n):4=26
19n-6n=4*26
13n=104
n=104/13
n=8

(17n-8n)*13=354
221n-104n=354
117n=354
n=354/117