REASONING - Without solving, how can you tell that x = 7 is not a solution of 3x + 10 = 20?

asked Oct 8, 2017 66.6k views

5 votes

REASONING - Without solving, how can you tell that x = 7 is not a solution of
3x + 10 = 20?

7.9k points

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3 votes

Because 7 times 3 is 21 and without even having to add the ten you already know it does not equal 20.

Soni Sol answered Oct 11, 2017

8.8k points

3 votes

Because anything that is multiplied by 3 and added to 10 will not equal 20

Teddichiiwa answered Oct 15, 2017

8.2k points

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