Posted by **Audrey** on Friday, October 5, 2007 at 3:39pm.

1. What is the first step for solving this system by substitution? 3x-2y=8

x+7y=10

2. How many solutions does this system of equations have? 3y-6x=12

y-2x=4

- Algebra 2 -
**Reiny**, Friday, October 5, 2007 at 5:43pm
#1

I would isolate the x in the second equation,

that is, x = 10-7y

then substitute into the first equation.

#2

an infinite number of solutions, since the first equation is simply 3 times the second.

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