Question 28824: Goodevening!!! I have the new problems again and i beg you to answer me more clearly.
I can not solve (1) 4x - y = -3 and 2x -3y = 1
(2) 2x + 4y = -12 and 3x + 5y = -14
(3) 2x - 3y = 2 and -4x + 6y = 2
how to solve ??
Your Faithfully
student E'mmaModi
Answer by xcentaur(357)   (Show Source):
You can put this solution on YOUR website! (1) 4x - y = -3 and 2x -3y = 1
| Solved by pluggable solver: SOLVE linear system by SUBSTITUTION |
Solve:
 We'll use substitution. After moving -1*y to the right, we get:
 , or  . Substitute that
into another equation:
 and simplify: So, we know that y=-1. Since , x=-1.
Answer:  .
|
(2) 2x + 4y = -12 and 3x + 5y = -14
| Solved by pluggable solver: SOLVE linear system by SUBSTITUTION |
Solve:
 We'll use substitution. After moving 4*y to the right, we get:
 , or  . Substitute that
into another equation:
 and simplify: So, we know that y=-4. Since , x=2.
Answer:  .
|
(3) 2x - 3y = 2 and -4x + 6y = 2
| Solved by pluggable solver: SOLVE linear system by SUBSTITUTION |
Solve:
 We'll use substitution. After moving -3*y to the right, we get:
 , or  . Substitute that
into another equation:
 and simplify: So, we know that y=-6=0. Since , x=-8.
Answer:  .
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