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Solve the following system of Linear Equations. Verify your solution.

4x + 3y = 13

5x + y – 8 = 0

 Oct 20, 2015

Best Answer 

 #1
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+5

Solve the following system of Linear Equations. Verify your solution.

4x + 3y = 13

5x + y – 8 = 0

 

Solve the following system:
{4 x+3 y = 13 |     (equation 1)
-8+5 x+y = 0 |     (equation 2)
Express the system in standard form:
{4 x+3 y = 13 |     (equation 1)
5 x+y = 8 |     (equation 2)
Swap equation 1 with equation 2:
{5 x+y = 8 |     (equation 1)
4 x+3 y = 13 |     (equation 2)
Subtract 4/5 × (equation 1) from equation 2:
{5 x+y = 8 |     (equation 1)
0 x+(11 y)/5 = 33/5 |     (equation 2)
Multiply equation 2 by 5/11:
{5 x+y = 8 |     (equation 1)
0 x+y = 3 |     (equation 2)
Subtract equation 2 from equation 1:
{5 x+0 y = 5 |     (equation 1)
0 x+y = 3 |     (equation 2)
Divide equation 1 by 5:
{x+0 y = 1 |     (equation 1)
0 x+y = 3 |     (equation 2)
Collect results:
Answer: | 
| {x = 1
y = 3

 Oct 20, 2015
 #1
avatar
+5
Best Answer

Solve the following system of Linear Equations. Verify your solution.

4x + 3y = 13

5x + y – 8 = 0

 

Solve the following system:
{4 x+3 y = 13 |     (equation 1)
-8+5 x+y = 0 |     (equation 2)
Express the system in standard form:
{4 x+3 y = 13 |     (equation 1)
5 x+y = 8 |     (equation 2)
Swap equation 1 with equation 2:
{5 x+y = 8 |     (equation 1)
4 x+3 y = 13 |     (equation 2)
Subtract 4/5 × (equation 1) from equation 2:
{5 x+y = 8 |     (equation 1)
0 x+(11 y)/5 = 33/5 |     (equation 2)
Multiply equation 2 by 5/11:
{5 x+y = 8 |     (equation 1)
0 x+y = 3 |     (equation 2)
Subtract equation 2 from equation 1:
{5 x+0 y = 5 |     (equation 1)
0 x+y = 3 |     (equation 2)
Divide equation 1 by 5:
{x+0 y = 1 |     (equation 1)
0 x+y = 3 |     (equation 2)
Collect results:
Answer: | 
| {x = 1
y = 3

Guest Oct 20, 2015
 #2
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+5

I am pretty sure that x=1 and y=3??? 

 Oct 20, 2015

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