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Solve the system of equations.
7x−3y=20
y=5x−4
​I NEED HELP ASAP, NO EXPLANATION NEEDED JUST ANSWER I WILL MARK BRAINLIEST THANK YOU

Respuesta :

wegnerkolmp2741o

Answer:

x= -1  , y = -9

Step-by-step explanation:

7x−3y=20

y=5x−4

Substitute the second equation into the first equation

7x - 3(5x-4) = 20

distribute

7x -15x +12 = 20

Combine like terms

-8x +12 = 20

subtract 12 from each side

-8x +12-12 = 20-12

-8x = 8

divide each side by -8

-8x/-8 = 8/-8

x = -1

Now we need to find y

y = 5x-4

y = 5(-1) -4

y = -5-4

y = -9

amna04352

Answer:

(-1,-9)

Step-by-step explanation:

7x−3y=20

y=5x−4

7x - 3(5x - 4) = 20

7x - 15x + 12 = 20

-8x = 8

x = -1

y = 5(-1) - 4

y = -9