How to solve the equation x-0.7x = 5.1

How to solve the equation x-0.7x = 5.1

The first step is to extract the common factor X: X &; (1-0.7) = 5.1 → 0.3, x = 5.1
Second step: x = 5.1 △ 0.3
The third step comes to the conclusion: x = 17

7x-2.7x5 = 25 solved by equation

7x-2.7*5=25
7x=25+(2.7*5)
7x=25+13.5
7x=38.5
x=5.5

Solving equation 4 + 0.7x = 102

4+0.7x=102
0.7x=102-4
0.7x=98
x=140

7 x-4 = 0.2 + 11

1.7x-4=0.2+11
Multiply 10 on both sides at the same time
17x-40 = 2 + 110 (denominator removed)
17x = 2 + 110 + 40 (transfer)
17x = 152 (merge similar items)
X = 17 / 152 (merge similar items)
So x = 17 / 152 is the solution of the original equation
The solution seems a little strange. Let's see if the copy is wrong