Kayla D.
asked • 09/15/15
what isx+y=3, when y=7-x?
Mark M.
answered • 09/15/15
Mathematics Teacher - NCLB Highly Qualified
x + y = 3, y = 7 - x substitute for y
x + (7 - x) = 3
x + 7 - x = 3
7 = 3
No solution.
Inconsistent equations.
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