Answer:
[tex]x+ 0.4x[/tex]
Or
[tex]1.4x[/tex]
Step-by-step explanation:
When x is increased by 40%, then we find 40% of x and add it to x.
[tex]x + \frac{40}{100} x[/tex]
We can simplify this to get;
[tex]x + \frac{4}{10} x[/tex]
This is the same as:
[tex]x + 0.4x[/tex]
When we add we obtain:
[tex]1.4x[/tex]
