Решите уравнения: 9(х-1)=х+15 (11х+14)-(5х-8)=25 12-4(х-3)=39-9х 2(3х+5)-3(4х-1)=11.8

Question

Решите уравнения: 9(х-1)=х+15 (11х+14)-(5х-8)=25 12-4(х-3)=39-9х 2(3х+5)-3(4х-1)=11.8

Answer 1

9х-9=х+15
8х=24
х=3

11х+14-5х+8=25
6х=3
х=0,5

12-4х+12=39-9х
5х=15
х=3

6х+10-12х+3=11,8
-6х=-1,2
х=0,2

Answer 2

1)9*(x-1) = x+15
9*x-9*1 = x+15
9*x = 24 + x
8*x = 24
x = 3

2)(11*x+14)-(5*x-8) = 25
11*x+14-5*x+8 = 25
22 + 6*x = 25
6*x = 3
x=

3)12-4*(x-3) = 39-9*x
12-4*x+4*3 = 39-9*x
-4*x = 15 - 9*x
5*x = 15
x=3

4)2*(3*x+5)-3*(4*x-1) = 11.8
2*3*x+2*5-3*4*x+3*1 = 11.8
13 - 6*x = 11.8
-6*x = -1.2
x = 0.2