Reason
Given
Statement
7 + x = 12
x + 7 = 12
(x + 7) - 7 (12) - 7
(x...
Mathematics, 19.04.2021 15:40 lollipop83
Reason
Given
Statement
7 + x = 12
x + 7 = 12
(x + 7) - 7 (12) - 7
(x + 7) + - 7 = 12 +-7
x + 7 +-7) = 12 +-7
*+ 0 = 12 +-7
X = 12 +7
x=5
Subtraction property of equality
a. b = a + b (Rewrite subtraction as addition)
Associative property of addition
a +30 (Additive Inverse)
a + 0 = a (Additive Identity)
Substitution
A student solved the given equation and justified every step except one. What is the missing reason?
Sa
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