Question

If x + 12 = 12 + 7, then by commutativity of addition x = *​

Answer 1

$x \: + \: 12 \: = \: 12 \: + \: 7 \\ \\ x \: = \: 12 \: + \: 7 \: - \: 12 \\ \\ x \: = \: 7$

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Answer 2

Answer:

x = 7

Step-by-step explanation:

x + 12 = 12 + 7

Commutative property of addition =  a + b = b + a

So, on comparing

x + 12 = 12 + 7

We get,

x = 7