Transcript Algebra 1 Chapter 6 Section 2

U Try
Show why the point is not a
solution to the system
( -2,9)
5x + y = -1
6x + 2y = 4
Algebra 1
Chapter 6 Section 2
Solving Systems of Equations by
Substitution
Solution
• A set of coordinates that make all of the
equations in a system true
So x in equation 1 = x in equation 2
&
y in equation 1 = y in equation 2
y = 2x - 7
y = -3x + 8
Sometimes you must solve 1 equation
for 1 variable
3x + y=2
4x + y = 20
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