|
Question 58668This question is from textbook
: Solve the systems of equation by substitution
{x-5y=12
{3x=4y=-2
and
{2x-3y=5
{5x=4y=1
This question is from textbook
Answer by funmath(2933)   (Show Source):
You can put this solution on YOUR website! Solve the systems of equation by substitution
{x-5y=12
{3x=4y=-2
and
{2x-3y=5
{5x=4y=1
You mis-typed both problems what did you mean to type?
I'll do one, with my own guess as to what you might have meant.
L1) x-5y=12
L2) 3x+4y=-2
***Solve L1) for x and sustitute that into L2) and solve for y.
x-5y+5y=12+5y
x=12+5y
:
3(12+5y)+4y=-2
36+15y+4y=-2
36+19y=-2
-36+36+19y=-2-36
19y=-38
19y/19=-38/19
y=-2
***substitute -2 in for y in L1) and solve for x:
x-5(-2)=12
x+10=12
x+10-10=12-10
x=2
The solution is (x,y)=(2,-2)
Happy Calculating!!!
|
|
|
| |
