Solve x + 2y = 13 and 4x + 8y = -9

Solution:

The set of given linear equations x + 2y = 13 and 4x + 8y = -9 can be solved simultaneously as shown below:

x + 2y = 13 — (1)

4x + 8y = -9 — (2)

Multiply (1) by 4 and then subtract (2) from (1)

4x + 8y = 52

4x + 8y = -9

0x + 0y = 61

Since Left Hand Side(LHS) has no variable the set of equations have no solutions

Solve x + 2y = 13 and 4x + 8y = -9

Summary:

Equations x + 2y = 13 and 4x + 8y = -9 are inconsistent and hence no solutions.