Step
Justification
Step 1: 2(x−4)+x5=2x+9
Given
S...
Mathematics, 02.03.2020 22:13 paiged55
Step
Justification
Step 1: 2(x−4)+x5=2x+9
Given
Step 2: 2x−8+x5=2x+9
Distributive property of multiplication over addition
Step 3: 10x−40+x=10x+45
Commutative property of multiplication
Step 4: 11x−40=10x+45
Associative property of addition
Step 5: x−40=45
Subtraction property of equality
Step 6: x=85
Addition property of equality
Which step of the solution has an incorrect justification?
A
Step 2
B
Step 3
C
Step 4
D
Step 5
Answers: 1
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