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

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The equation is $\"\"$ .

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According to addition property of equality: if a = b, then a + c = b + c. $\"\"$ (Add 5.2 to each side)

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

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$\"\"$ (Add: 2.15 + 5.2 = 7.35) $\"\"$

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According to Subtract property of equality: if a = b, then a $\"\"$ c = b $\"\"$ c. $\"\"$ (Subtract 4.33j from each side) $\"\"$ (Commutative property: a + b = b + a)

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

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

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

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$\"\"$ (Divide each side by 2.45)

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$\"\"$ (Cancel common terms)

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

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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: 12.99 + 2.15)

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15.14 = 15.14 (Subtract: $\"\"$ )

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Here the solution is true. $\"\"$

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The value of the expression is $\"\"$ .