Решите уравнение 7.43-1.28x=1.42x+5

7,43 - 1,28x = 1,42x + 5
7,43 - 5 = (1,42 + 1,28)x
2,43 = 2,7x
x = 2,43 : 2,7
х = 0,9

Проверка: 7,43 - 1,28*0,9 = 1,42*0,9 + 5
                      7,43 - 1,152 = 1,278 + 5
                              6,278 = 6,278

ответ: {0,9} 

7.43 + -1.28x = 1.42x + 5  
 7.43 + -1.28x = 5 + 1.42x
 7.43 + -1.28x = 5 + 1.42x
7.43 + -1.28x + -1.42x = 5 + 1.42x + -1.42x
-1.28x + -1.42x = -2.7x 7.43 + -2.7x = 5 + 1.42x + -1.42x
1.42x + -1.42x = 0.00 7.43 + -2.7x = 5 + 0.00 7.43 + -2.7x = 5
 7.43 + -7.43 + -2.7x = 5 + -7.43
 7.43 + -7.43 = 0.00 0.00 + -2.7x = 5 + -7.43 -2.7x = 5 + -7.43
 x = 0.9