Question

solve by elimination way 2x-y=8 and 2x+y=6

Answer 1

add both equations and you get
4x = 14
x = 3.5
and plug this into first equation to get
7 - y = 8
y = -1


answer (3.5, -1)

Answer 2

ok daverer?

Answer 3

or have u any questions

Answer 4

how did you do these i am new to these.....

Answer 5

by the way sorry for the late reply

Answer 6

ok - but i have to eat now - be back in 10 minutes

Answer 7

okay.no problem i'll wait

Answer 8

sorry i was longer than i thoght id be

2x-y=8
2x+y=6
there are two unknowns but can be solved as we have 2 equations
we can add or subtract equations
if we add the above the y disappears because -y + y = 0
so we get
4x + 0 = 14
4x = 14
divide both sides by 4 :
x = 14/4 = 3.5
Now we can plug x = 3.5 into the second equation (any one will do):
2(3.5) + y = 6
7 + y = 6
y = 6-7 = -1

so thats it x=3.5 and y =-1
this is the solution
we can now check if these are correct by substituting our vales for x and y into the first equation
2x - y = 8
so
2(3.5) - (-1)
= 7 + 1 = 8
whch checls out