We see : 4x - 5y = -20We can write the negative form of 4x - 5y by switching the signs : - (4x - 5y ) = -4x + 5ySince -4x + 5y is the negative form of 4x - 5y, the result should also be the opposite : 20And -4x + 5y is indeed 20, so the answer is infinitely many solutions.
Answer:
infinitely many solutions
Step-by-step explanation:
4x - 5y = - 20 → (1)
- 4x + 5y = 20 → (2)
add (1) and (2) term by term
0 + 0 = 0
0 = 0 ← true statement
this indicates the system has infinitely many solutions
