Question

Решите уравнение?
1) 2*(х+11,3)= 54,2
2)(0,9х+4,55)*0,3=1,5 

Answer 1

1)2х+22.6=54,2
2х=54,2-22,6
2х=31,6
х=15,8

Answer 2

1)
х+11.3=54.2:2
х+11.3=27.1
х=27.1-11.3
х=15.8
Проверка:
2*(15.8+11.3)=2*27.1=54.2

2)
0.9х+4.55=1.5:0.3
0.9х+4.55=5
0.9х=5-4.55
0.9х=0.45
х=0.45:0.9
х=0.5

Проверка:
(0.9*0.5+4.55)*0.3=(0.45+4.55)*0.3=5*0.3=1.5