anonymous
  • anonymous
anyone help me with this ... 0.04(y-4)+0.02y=0.14y-0.03(30)
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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whpalmer4
  • whpalmer4
First, use the distributive property: a(b-c) = ab - ac Then add and subtract the same thing from both sides to end up with all the y terms on the left side, and the leftover numbers on the right side. If y still has a number in front of it (coefficient), divide both sides by that number to give you y = For example: 0.6(y-2) + 0.5y = 0.3y - .2(10) 0.6y - 1.2 + 0.5y = 0.3y - 2 1.1y - 1.2 = 0.3y -2 Add 1.2 to both sides 1.1y - 1.2 + 1.2 = 0.3y - 2 + 1.2 1.1y = 0.3y - 0.8 now subtract 0.3y from both sides 1.1y - 0.3y = 0.3y - 0.3y - 0.8 0.8y = -0.8 Now divide both sides by 0.8 0.8y / 0.8 = -0.8 / 0.8 y = -1 That's *not* your problem, so the answer probably isn't the same! I'm just illustrating typical steps to solve such a problem.
ZeHanz
  • ZeHanz
Don't know about you, but I *hate* decimals in equations! So I always try to get rid of them. Everything gets much clearer then. If you multiply everything with 100, you get: 4(y-4)+2y=14y-3*30. See: looks much better! Now do the next steps yourself, maybe with a little help from @whpalmer4's scheme...
whpalmer4
  • whpalmer4
Yep, I agree with @ZeHand, eliminating fractions and decimals first often makes the work easier.

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whpalmer4
  • whpalmer4
But it isn't *necessary* to solve this problem, so I left it out. It is good to do some practice with decimals, as you'll likely encounter many problems later where you can't eliminate them,, and being proficient will make life easier. My philosophy is that you should definitely seek to find the easy route to solve something, but practice the hard routes too, so when you are forced to use them, you may grumble and curse a bit, but you still get the right answer!

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