Steve S. answered • 02/19/14
Tutor
5
(3)
Tutoring in Precalculus, Trig, and Differential Calculus
6x-4y=1
-6x-4y=7
Add the equations:
0-8y = 8
y = -1
6x-4(-1)=1
6x = 1-4=-3
x = -1/2
Solution is (-1/2,-1)
check:
6x-4y=? 1
6(-1/2)-4(-1)=? 1
6(-1/2)-4(-1)=? 1
-3+4=1 √
-6x-4y=? 7
-6(-1/2)-4(-1)=? 7
-6x-4y=? 7
-6(-1/2)-4(-1)=? 7
3+4= 7 √
