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Mckenzie Wilkerson
Mathematics
18 June, 19:14
3x+7=13 (x=-2; x=2; x=5)
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Darien Newman
18 June, 19:38
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There are two sites of every equation. The sign = means that the two sites are equal.
So, we know that 3x+7 is equal as 13. 3x+7=13
In order to find the unknown x we should rewrite the equation such that on one site we have only x and on the other all left
3x=13-7 ("+"is "-" on the other site of the equation)
3x=6
x multiplied with 3 gives 6, so we need to divide 6 with 3 in order to get the value of x.
x=6/3=2
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Marshmallow
18 June, 19:38
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3x + 7 = 13
3x = 13 - 7
3x = 6
x = 6:3
x = 2
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