With both & with explanation : )

5)x=0,y=-4

6)x=8&y=6

Step-by-step explanation:

5)x+7y=-28

3x-5y=20

x=0, y=-4

for x+7y=-28 let's get "x" by itself, so bring 7y to the right

x=-28-7y

now that we have the value of "x"let's substitute it in "3x-5y=20"

3(−7y−28)−5y=20

-21y-84-5y=20

−26y−84=20(Simplify both sides of the equation)

−26y−84+84=20+84(Add 84 to both sides)

−26y=104

−26y /-26=104/-26

(Divide both sides by -26)

y=−4

Step: Substitute−4 for y in "x=−7y−28:"

x=−7y−28

x=(−7)(−4)−28

x=0(Simplify both sides of the equation)

x=0 and y=−4

USE THIS METHOD FOR #6 as well hope this helps!

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this

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