Question

1). (5х-4)+27=123 2). 179-(4у+19)=60 3). (2х-17)-19=44 4). 2*(6х-14)=92 помогите решить уравнения.

Answer 1

(5х -4) + 27 = 123
5х -4 +27 = 123
5х +23 = 123
5х= 123-23
5х=100
х=100:5
х=20
(5*20-4)+27 = 123
(100-4) +27= 123
96+27=123
123=123

179 - (4у +19) = 60
179 - 4у  - 19  = 60
160 - 4у =60
4у= 160 - 60
4у=100
у=100:4
у=25
179 - (4*25 + 19) = 60
179 -  119 = 60
60=60

(2х-17) - 19 = 44
2х - 17 - 19 = 44
2х -36 = 44
2х=44+36
2х= 80
х=80: 2
х = 40
(2*40  -17) - 19 =44
63 - 19 = 44
44=44

2(6х-14)=92
12х - 28 = 92
12х = 92+28
12х = 120
х=120 : 12
х=10
2*(6*10 - 14) = 92
2* 46 =92
92=92