Question

$4x-2,6x=42$ решите

Answer 1

(4x-2.6x)=42

1.4x=42

x=42:1.4

x=30

Все правильно ...

Answer 2

$4x - 2.6x = 42 \\ 1.4x = 42 \\ x = 42 \div 1.4 \\ x = 30$