Question

explain in complete sentences how you would use the SUBSTITUTION METHOD to solve the following system of equations.

5x - y = -1
7x - 3y = 13

Answer 1

can someone please answer this problem im very confused

Answer 2

yea sure :)

Answer 3

ok thank you

Answer 4

-y=-1-5x
y=1+5
now substitute y in 2nd equation

Answer 5

7x-3(1+5x)=13

Answer 6

is that last subsitution to check the answere?

Answer 7

In the Savannah, a sinkhole opened catching some ostrich and cheetah. There was a total of 13 animals to be rescued. If 44 INDIVIDUAL feet were pulled from the muck, how many ostrich and cheetah were rescued?

Answer 8

last question i need help with

Answer 9

seems easy but i can't seem to figure it out

Answer 10

7x-3-15x=13
-8x=13+3
x=16/-8
x=-2

now,substitute x value in one of the equation
5(-2)-y=-1
-10-y=-1
-y=-1+10
-y=9
y=-9

Answer 11

its for finding the value of y

Answer 12

ok.

Answer 13

from first equation you get y=5x+1
7x-3y=13 --- 7x-3(5x+1)=13 --- 7x-15x-3=13 --- -8x = 16 --- x=16/(-8)
x= -2 --- than y=5(-2) +1 --- y= -10+1 --- y= -9

x= -2
y= -9