Answer:
Solution: x=-1, y=1
Step-by-step explanation:
System of equations
Solve the system:
[tex]\displaystyle \left \{ {{4x+9y=5} \atop {-4x+7y=11}} \right[/tex]
We'll use the elimination method.
Adding both equations:
9y + 7y = 5 + 11
Simplifying:
16y = 16
Dividing by 16
y = 16/16 = 1
y = 1
From the first equation:
4x = 5 - 9y
4x = 5 - 9*1 = 5 - 9 = -4
Dividing by 4:
x = -4/4
x = -1
Solution: x=-1, y=1
