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

\

\

The equation is $\"\"$

\

\

\

Addition property of equality: If a = b then a + c = b + c.

\

\

\

$\"\"$ (Add 9.1 to each side)

\

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

\

\

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

\

$\"\"$ (Add: $\"\"$ ) $\"\"$

\

$\"\"$ (Divide each side by 0.3)

\

$\"\"$ (Cancel common terms)

\

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

\

$\"\"$

\

$\"\"$

\

Check:

\

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

\

$\"\"$

\

$\"\"$ (Multiply: $\"\"$ ) \ \

\

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

\

The equation is true. \ \ $\"\"$

\

The solution $\"\"$ .