What is the value of x in the solution to this system of linear equations?
X+ y = 4
x-y = 6
a. 4

b. 6

с. -1

d. 5

d:5

Step-by-step explanation:

isolate the y in second equation

x=y+6

substitute back into first equation

(y+6)+y=4

combine like terms

2y+6=4

subtract 6 from both sides

2y=-2

divide both sides by 2

y=-1

then plug y into either equation, ill use the first one

x+(-1)=4 and then solve by subtracting -1 and you get 5

x=half

step-by-step explanation: