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Is x equals -1 is a solution of x plus y equals 4 x-y equals 6?
Wiki User
∙ 14y ago
If for x = -1 we find the same value of y in both equations, then x = -1 will be a part of the solution of the system.
Let's suppose that x = -1 is the x-coordinate of the solution of the given system
x + y = 4
x - y = 6.
x + y = 4
-1 + y = 4
-1 + 1 + y = 4 + 1
y = 5
x - y = 6
-1 - y = 6
-1 - 6 + y - y = 6 - 6 + y
-7 = y
Since we have two different values for y, we say that x = -1 is not a part of the solution for the given system.
Wiki User
∙ 14y ago
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What is the solution for this linear equation x plus y plus z equals 6 x plus 2y plus z equals 7 2x plus y equals 6?
The solution is (x, y, z) = (2.5, 1, 2.5).
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Not sure what you mean; that equation certainly has a solution.
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That is the commutative property of equality.
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No.
Is there a no solution in y equals x-1 and y equals -x plus 1?
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What is the solution for this linear equation x plus y plus z equals 6 x plus 2y plus z equals 7 2x plus y equals 6?
The solution is (x, y, z) = (2.5, 1, 2.5).
How many solutions does 2x plus y equals 5 and 2y plus x equals 4 have?
1 solution
What is the solution of the system -x plus y equals 4 and x plus y equals 2?
It is (-1, 3).
How can x plus 1 equals 2y if y-1 equals x?
solution: y = 0 x = -1
