Answer:
x=15
Step-by-step explanation:
This is a simultaneous equation
2x-3y=45 ------------------------------ equation i
x+y=10 -------------------------------equation ii
from equation ii
x+y=10
make x the subject of the matter
we have,
x=10-y
in equation i
substitute x for 10-y
2x-3y=45----------------------i
since x=10-y
we have,
2(10-y) - 3y=45
20-2y=3y=45
collect like terms
-2y-3y=45-20
-5y=25
divide both sides by -5
we have y=-5
substitute y for-5 in equation i
x+y=10
x+-5=10
collect like terms
x=10+5
x=15
therefore
x=15
Answer:
A. y + 5 = negative two-fifths (x + 3)
Answer:
mph
Step-by-step explanation:
hello,
it travels 
miles in 2.5 hours
So in 1 hours it travels
miles
hope this helps
Answer:
No
Step-by-step explanation:
I haven't learned this but my brother says its incorrect, he is in Highschool, though he doesn't use Brainly.
