Posted by Audrey on Friday, October 5, 2007 at 3:39pm.
1. What is the first step for solving this system by substitution? 3x2y=8
x+7y=10
2. How many solutions does this system of equations have? 3y6x=12
y2x=4

Algebra 2  Reiny, Friday, October 5, 2007 at 5:43pm
#1
I would isolate the x in the second equation,
that is, x = 107y
then substitute into the first equation.
#2
an infinite number of solutions, since the first equation is simply 3 times the second.