3 years ago

Sum of a number x and three is twelve

2 answers:

6 0

If you mean this:
x + 3 = 12

then for finding the answer you should just put -3 on both sides and you will get 9 for your answer!

Happy Thanksgiving :)

sergejj [24]3 years ago

4 0

1)12-3=9
2)you need to check it so
3)9+3=12

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<span>x= -8 + y
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substitute </span>x= -8 + y into -9x + 6y= 9

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</span><span>x= -8 + 21
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