Answer:
The greatest common factor is 1.
Step-by-step explanation:
In this question we will factorize the expressions given and select the common factors among all.
For 9x² = 1×3×3×X×X
For 2 = 1×2
For 6x = 1×2×3×X
So we find the common factor in all expressions is = 1
Answer is 1.
Substitute y = -x into the first equation:
-8x - 7(-x) = -5
-8x + 7x = -5
-x = -5
x = 5
Substitute x = 5 into y = -x
y = -(5)
y = -5
Answer: x = 5, y = -5