SOLUTION: If x + y = -23 and x - y = 7 then 2x - y equals A.-31 B.-1 C.1 D.8 E.15

Algebra.Com
Question 277959: If x + y = -23 and x - y = 7 then 2x - y equals
A.-31 B.-1 C.1 D.8 E.15

Answer by richwmiller(17219)   (Show Source): You can put this solution on YOUR website!
x+y=-23
x-y=7
2x=-16
x=-8
y=-15
-16+15=-1
B)-1

RELATED QUESTIONS

If 1/x+4 = 6, then 1/x+8 equals.. A) 7/20 B) 6/25 C) 4 and 1/6 D) 3/10 E)... (answered by MathLover1,ikleyn)
If y=e^x (x-1) then y''(0) equals (A) -2 (B) -1 (C) 0 (D) 1 (E) none of... (answered by drk)
If x a / y - a = 1 and x>0 and y>0 then which expression best represents a? a... (answered by Fombitz)
If x, y, and z are non-zero integers, x = 14/z and yz= 7, then x/y = A) 0.5 B) 1 C)... (answered by richard1234)
If x^2 + y^2 = 2xy, then x must equal ? A) –1 B) 0 C) 1 D) –y E)... (answered by palanisamy,Alan3354)
If u = log ( e^x + e^y ) , then ∂u/∂x + ∂u/∂y = ? A ) e^x +... (answered by Fombitz)
Which hyperbolas have one vertex in common with the hyperbola... (answered by MathLover1)
If x^2 + y^2 = 40 and xy = 12, then x + y = A. 7. B. 8. C. 7 or −7. D. 8 or... (answered by checkley77)
If x=3 and y=3 then what is y in terms of x? Answer Choices: A. y= 1/x B. y= -1/x... (answered by Alan3354,fractalier)