Best answer:
Yes. It is okay to do:
3x + 2x + 5 = 20
3x + 5 = 20 - 2x ... subtraction property
5 = 20 - 5x ...subtraction property
-15 = -5x ... subtraction property
3 = x ...division property (or whatever the proper name is)
As squaredance says, this is more work than 3x + 2x = 5x, but it's all legal so the grader should...
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Best answer: Yes. It is okay to do:
3x + 2x + 5 = 20
3x + 5 = 20 - 2x ... subtraction property
5 = 20 - 5x ...subtraction property
-15 = -5x ... subtraction property
3 = x ...division property (or whatever the proper name is)
As squaredance says, this is more work than 3x + 2x = 5x, but it's all legal so the grader should mark it as correct.
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1 day ago