This question is based on the concept of equations. Therefore, the correct option is A, Subtraction Property of Equality.
Given:
Equations : 3x + 4=10 and 3x = 6.
We have to choose appropriate property that justifies the statement: if 3x+4=10, then 3x=6.
According to the question,
By using the definition of subtraction property of equality,
The Subtraction Property of Equality states that, when both sides of an equation have the same number subtracted from them, then resulting expressions are equivalent.
It is given that,
3x + 4=10
By substracting property of equality, substracting both sides 4.
We get,
3x + 4 - 4 = 10 - 4
Therefore, 3x = 6
Hence, the correct option is A, subtraction property of equality.
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