Answer:
x = 2y - 7
x + y = 47
substitute x
2y - 7 + y = 47
3y = 54
y = 18
x = 2x18 - 7
x = 29
Answer:Ok so im in 5th grade and ik how to do this you should to Step-by-step explanation: b2-4b-16 6.2
decreases
Step-by-step explanation: