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What is the value for x in the following systems of equations x-y equals 5 2x plus y equals 7?
Wiki User
∙ 14y ago
x - y = 5
2x + y = 7 (use the substitution method)
y = x - 5
2x + y = 7 (substitute x - 5 for y into the second equation)
2x + y = 7
2x + x - 5 = 7
3x = 12
x = 4
Thus x = 4 satisfies both the equations of the system.
Wiki User
∙ 14y ago
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