I need help to answer/ solve this What is the first step for solving this...

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 :

-6 is the correct option from the above given options

answer: 42

use a calculator to find that 845/73 = 11.575

the whole part of the answer is 11. multiply this by 73 to get 11*73 = 803.

subtract that result from 845 to get 845 - 803 = 42