Answer:
Explanation:
Multiply the first equation by -5:
-5x - 5y = 100
Add the two equations:
-10x - 6y = 84
Solve for x:
x = 8.4 + 0.6y
Substitute x back into one of the original equations:
x + 6y = -20
8.4 + 0.6y + 6y = -20
8.4 + 6.6y = -20
6.6y = -28.4 - 8.4
6.6y = -36.8
y = -5.52
Substitute y back into x = 8.4 + 0.6y:
x = 8.4 + 0.6(-5.52)
x = 8.4 - 3.312
x = 5.088
Therefore, the solution to the system of equations is x = 5.088, y = -5.52.