Answer:
x+2y=12-------(1)
x-2y=3---------(2)
Adding equations 1 and 2
we get
2x=18
x=9
Equation 1
9+2y=15
2y=15-9
2y=6
y=3
The solution of the given system is x=9, y=3
Step-by-step explanation
-4x +4 = -3x + 31
4 - 31 = -3x + 4x
-27 = x
Answer: -25
Step-by-step explanation:
Answer:
the second one (Diego)
Step-by-step explanation:
7a-3a
5b+4b
Answer:
true
Step-by-step explanation: