Answer:
x + 6.8 = 8.9
Explanation:
First let's break this sentence down into parts.
A number increased by 6.8 is 8.9.
"A number" - This value is unknown, therefore we will represent it with x.
"increased by" - This signifies that we will be adding.
"is" - This represents the equal sign (=)
Now let's put these together.
x + 6.8 = 8.9
This is your expression.
Hope this helps!