$\"\"$

The equation is 0.2n + 3 = 8.6.

According to subtraction property of equality: if a = b, then $\"\"$ .

$\"\"$ (Subtract 3 from each sides).

$\"\"$ (Additive inverse property: $\"\"$ )

$\"\"$ (Subtract: $\"\"$ )

$\"\"$

According to division property of equality:

For any number a, b and c, If a = b then $\"\"$ .

$\"\"$ (Divide both sides by 0.2)

$\"\"$ (Cancel common terms)

$\"\"$ (Divide: $\"\"$ )

$\"\"$

Check:

To check the solution, substitute $\"\"$ in original equation.

0.2(28) + 3 = 8.6

5.6 + 3 = 8.6 (Multiply:0.2(28) = 5.6)

8.6 = 8.6 (Add: 5.6 + 3 = 8.6)

Compare the values, the equation is true.

$\"\"$

The value of $\"\"$ .