Question

Lainey has solved the equation 4.2 + x = 16.5 . Her answer is x = 12.3 . Explain how Lainey can use the substitution property of equality to check her solution.

Answer 1

Answer:

She can do 4.2+12.3 to see if it equals 16.5.

Step-by-step explanation:

Answer 2

• Substitute value of x into the equation

$\\ \sf\longmapsto x+4.2=16.5$

$\\ \sf\longmapsto 12.3+4.2=16.5$

$\\ \sf\longmapsto 16.5=16.5$

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