Solve the system of equations 7x-3y-20 and y =5x-4 x= and y =

x = -1  &   y = -9

Step-by-step explanation:

The given equations are

7x - 3y = 20  ⇒(1)

y = 5x - 4 ⇒ (2)

multiplying (2) by 3

3y = 15x - 12 ⇒ (3)

Add (1) and (3)

∴ 7x - 3y + 3y =20 + 15x - 12

∴ 7x = 15x + 8

∴ 7x - 15x = 8

∴ -8x = 8

∴ x = -1

substitute by x at (2)

∴ y = 5 * (-1) - 4 = -5 - 4 = -9

So, x = -1  and   y = -9

the answer to the question is a

step-by-step explanation:

it has the same slope and the same y-intercept.

y + 11 = -7/9(x - 18)

y + 11 =-7/9x + 14

b

y = -7/9x + 3

y-intercept (0, 3)

1 and 2

step-by-step explanation: