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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?

Siong Thye Goh
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Mumini Erhan
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  • Solve for $x$, and then find $x-400$ and $x+2600$. – KM101 Jan 03 '19 at 16:16
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    Use better titles, ones that describe the problem better. In this case "solving a system of equations" is far better than "equation/algebra" – rschwieb Jan 03 '19 at 16:21

1 Answers1

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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

Sight
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  • Oh I solved it a different way by mistake, my bad. Do you have to solve it with two separate variables? If not, then u could use my method. – Sight Jan 03 '19 at 16:14