# Math 116

posted by .

if I solve this by substitution
8x+7y=-13
x=29-7y
I end up with -3.8

But I think there is no solution

• Math 116 -

sub the 2nd into the 1st

8(29-7y) + 7y = -13
232 - 56y + 7y = -13
-49y = -245
y = 245/49 = 5

then x = 29 - 7(5) = -6

• Math 116 -

You should have questioned your "no solution" answer, since the lines have different slopes. The have to intersect somewhere.

## Similar Questions

1. ### Math 116 algebra please check

Solve the following systems of equations x + 6y = (1) x+ 9 - 6y (2) What is the solution of the system?
2. ### Math 116 algebra please check

Solve by the substitution method 3x + 7y =15 x=16-6y What is the solution of the system (-2,3)
3. ### Math 116 algebra please check

Solve by elimination method 2x + 3y =1 4x + 6y =2 What is the solution of the system N there is no solution
4. ### math

solve by the substitution method 3x + 6y = 27 -2x + y = 12 what is the solution of the system..(type an ordered pair, or N if there is no solution)
5. ### Algebra

Solve by substitution or elimination method: 4x – 5y = 14 -12x + 15y = -42 when i try this solution i end up cancelling out the whole problem. can someone please help me!
6. ### alg math 116

9x +3y=-51,-5x +y=39 solve using substitution method
7. ### Math 116

Solve by the substitution method. 3x+8y=57 x=67-8y
8. ### algebra

i need help with these problems (either a solution or how to plug them into a graphing calculator): 1) Solve by substitution or elimination 4/x + 1/y + 2/z = 4 2/x + 3/y - 1/z = 1 1/x + 1/y + 1/z = 4 2)Solve the system of equations …
9. ### Math/116 week seven

solve by the substitution method. 2m+n=1 m-9n=10
10. ### Math

Use the substitution method to solve the following system of linear equations: x + y = 6 x = –y + 2 A. There are an infinite number of solutions. B. The solution is (2, 4). C. The solution is (4, 2). D. There is no solution.

More Similar Questions