I need help to answer/ solve this What is the first step for solving this system of equations using the SUBSTITUTION method?
x - 2y = 8
x = 5 - y

Step-by-step explanation:

Solve by Substitution :

// Solve equation [2] for the variable  y

[2]    y = -x + 5

// Plug this in for variable  y  in equation [1]

  [1]    x - 2•(-x +5) = 8

  [1]    3x = 18

// Solve equation [1] for the variable  x

[1]    3x = 18

[1]    x = 6

// By now we know this much :

   x = 6

   y = -x+5

// Use the  x  value to solve for  y

  y = -(6)+5 = -1

Solution :

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right

$649.60

step-by-step explanation: