SOLUTION: 1.what is the solution of the system of equations? 4x-8y=-4 5x+7y=-22 2.solve the system of euations below by elimination? 2x+y=15 5x-y=13 3.what is the solution of the s

Algebra ->  Systems-of-equations -> SOLUTION: 1.what is the solution of the system of equations? 4x-8y=-4 5x+7y=-22 2.solve the system of euations below by elimination? 2x+y=15 5x-y=13 3.what is the solution of the s      Log On


   

Question 309345: 1.what is the solution of the system of equations?
4x-8y=-4
5x+7y=-22
2.solve the system of euations below by elimination?
2x+y=15
5x-y=13
3.what is the solution of the systen of equations below?
4y-7x=-1
2y+3x=-33
4. give the solution to this system of equations,
2/7x+3/5y=-2
4/7x+1/5y=6
5.use the elimination process to solve the system of equations below,
-3x+5y=12
6x-10y=-21
6.solve the system of equations
5x-2y=11
2x-12=-3y
7.the sum of four times number and six times a second number is 36. the doffrence of five times the second number and thre times the first number is 49. find the numbers
Found 2 solutions by nyc_function, ichudov:
Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
BIG TIP: Post one question at a time or else no one will reply.

Answer by ichudov(507) About Me  (Show Source):
You can put this solution on YOUR website!
you cannot dump many problems in one question. I will solve just one
system%28+4x-8y=-4%2C+5x%2B7y=-22+%29+
Solved by pluggable solver: SOLVE linear system by SUBSTITUTION
Solve:
+system%28+%0D%0A++++4%5Cx+%2B+-8%5Cy+=+-4%2C%0D%0A++++5%5Cx+%2B+7%5Cy+=+-22+%29%0D%0A++We'll use substitution. After moving -8*y to the right, we get:
4%2Ax+=+-4+-+-8%2Ay, or x+=+-4%2F4+-+-8%2Ay%2F4. Substitute that
into another equation:
5%2A%28-4%2F4+-+-8%2Ay%2F4%29+%2B+7%5Cy+=+-22 and simplify: So, we know that y=-1. Since x+=+-4%2F4+-+-8%2Ay%2F4, x=-3.

Answer: system%28+x=-3%2C+y=-1+%29.