SOLUTION: solve the pair of linear equation: 3x- y+7/11 +2=10; 2y +x+11/7 =10

Algebra ->  Graphs -> SOLUTION: solve the pair of linear equation: 3x- y+7/11 +2=10; 2y +x+11/7 =10       Log On


   



Question 756622: solve the pair of linear equation:
3x- y+7/11 +2=10; 2y +x+11/7 =10

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
solve the pair of linear equation:
3x - y + 7/11 + 2 = 10
2y + x + 11/7 = 10
We can rearrange these equations to
3x - y + 7/11 = 8
x + 2y + 11/7 = 10
get rid of those annoying fractions
multiply the 1st equation by 11
multiply the 2nd equation by 7
33x - 11y + 7 = 88
7x + 14y + 11 = 70
which is
33x - 11y = 81
7x + 14y = 59
These are a pain, lets solve it graphically
-11y = -33x + 81
divide by -11
y = 3x - (81/11)
and
14y = -7x + 59
y = -(1/2)x + (59/14)
graph these two
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+3x-%2881%2F11%29%2C+-.5x%2B%2859%2F14%29%29+
my calc calls this x = 3.308, y = 2.56 (checks out in the 1st equation)