alg 2 check?
posted by tyneisha .
1.)solve for n:7n21=63
my answer: n=3
is this correct? please explain
2.)identify the x and y int for te equation 3x4y=12.

You'd know that n does not equal 3 by substituting it.
 7 * 3  21 = 63
21  21 = 42 (not 63)
7n21=63
Add 21 to both sides.
7n  21 + 21 = 63 + 21
7n = 42
n = 42 / 7
n = 6
n
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