use linear combinations to solve the system?
x-y=4
x+y=12
x=8
y=4....i know the answer but i dont know how to get there...
fun...
2x=16
plug in 8 for x
8-y=4
-y=-4
y=4
hoped I helped!
Two ways to do this problem:
1. add the 2 equations
get 2x = 16
x = 8 then y = 4
or substitue the value of x in terms of y from eqn (1) into equation (2)
x = y + 4 fm (1) then sub in (2)
Y + 4 + Y = 12
2Y = 8
Y = 4
THEN FROM (1)
X = Y + 4 = 8
Comments
fun...
x-y=4
x+y=12
2x=16
x=8
plug in 8 for x
8-y=4
-y=-4
y=4
hoped I helped!
x-y=4
x+y=12
Two ways to do this problem:
1. add the 2 equations
get 2x = 16
x = 8 then y = 4
or substitue the value of x in terms of y from eqn (1) into equation (2)
x = y + 4 fm (1) then sub in (2)
Y + 4 + Y = 12
2Y = 8
Y = 4
THEN FROM (1)
X = Y + 4 = 8