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

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The equation is $\"\"$ .

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

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$\"\"$ (Subtract 7 from each side)

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

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$\"\"$ (Add: 16 $\"\"$ 7 = 9)

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$\"\"$ (Add each side by $\"\"$ )

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

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$\"\"$

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To add fractions the denominators must be equal.

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Find the least common denominator (LCD).

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Multiples of 2: 2,4,6,8,10,12,14,..............

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Multiples of 5: 5,10,15,20,25,..................

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The least common multiple of 2 and 5 is10.

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$\"\"$

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$\"\"$

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$\"\"$

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

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$\"\"$

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According to Multiplication property of equality: if $\"\"$ , then $\"\"$ .

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$\"\"$ (Multiply $\"\"$ by each side)

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$\"\"$ (Cancel common terms)

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

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

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$\"\"$

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Check:

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

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$\"\"$

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

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

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11.9 = 11.9 (Subtract: $\"\"$ )

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$\"\"$

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The solution is $\"\"$ .