Jade solved the following equation:
3 + 5x - 7 = 3x - 9
Step
Work
Justification
1
5x + 3 - 7 = 3x - 9
Commutative property of addition
2
5x - 4 = 3x - 9
Addition property of equality
3
2x - 4 = - 9
Subtraction property of equality
4
2x = - 5
Addition property of equality
5
x = - 2.5
Division property of equality
Which step has an incorrect justification?
Answers (2)
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