Question 923081: solve this problem using elimination substitution and graphing
1)p+3q=16
p+q=6
Answer by MathLover1(20850)   (Show Source):
You can put this solution on YOUR website! Elimination/Addition
 .......eq.1
 .........eq.2
____________subtract 2 from 1
go to .........eq.2, plug in  for 
by SUBSTITUTION
.......eq.1
.........eq.2
____________
.......eq.1..solve for 
 ...substitute in 2
 .........eq.2..solve for
 ...both sides multiply by 
 ....substitute in eq.1
 .......eq.1
by Graphing
In order to graph these equations, we need to solve for q for each equation.
.......eq.1
.........eq.2
____________
 .......eq.1
 .........eq.2
____________
 .......eq.1
.........eq.2
____________
now find two points that lie on each line
.......eq.1...set 
 ...solve for
 ...if denominator same, numerator must be same too
point is ( , )=> x(or p)-intercept
.......eq.1...set 
 ...solve for
point is (, )=> y(or q)-intercept
.........eq.2
 .......eq.2...set
 ...solve for
point is ( ,)=> x(or p)-intercept
.......eq.2...set
 ...solve for
point is (,)=> y(or q)-intercept
plot points (,) and (,) and draw a line
plot points (,) and (,)and draw a line
|
|
|
