$\"\"$ $\"\"$

The equation is $\"\"$ \ \

$\"\"$ (Subtract 2.8 from each side)

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

$\"\"$ (Additive identity property: $\"\"$ ) \ \ $\"\"$ (Subtract: $\"\"$ ) \ \ $\"\"$

Check:

Substitutive the value $\"\"$ on original equation

$\"\"$

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

The solution $\"\"$ .