Answer:
34
Step-by-step explanation:
Answer:
the sustitucion metod is easy x=5 y=3
Step-by-step explanation:
x-3y=-4 (-2)
2x-y=7 (1)
-2x+6y=8
2x-y=7
5y=15
y=3
2x-3=7
2x=10
x=5
Answer:
12
Step-by-step explanation:
30-20=12
Answer:
25%
Step-by-step explanation:
1 white car + 3 black cars
4 cars in total
1 out of 4
1/4 = 0.25
25%