Ethan, Mcdonald and Willie earns $\$51700$ a month. Ethan earns $\$400$ less than Mcdonald and Willie earns $\$3000$ more than Ethan. How much do they all earn each?
Mcdonald's earnings is $X$.
Ethan: $x - \$400$
Willie: $x - \$400 + 3000$
I don't know the rest of the proccess.
$$X + x - 400 + x - 400 + 3000 = 57100$$
How do you get what each one of them earns?
You could first set how much Ethan earned as x and make the equation using, (x+400) <- How much McDonald earns (x+3000) <- How much Willie earns Then you have the equation, x+x+x+400+3000=51700. Or 3x+3400=51700. You then do, 3x=51700-3400=48300 x=48300/3 x=16100 (How much Ethan earns) Then for McDonald: 16100+400=16500 Then for Willie: 16100+3000=19100