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anonymous
 one year ago
Help please!
Solve 2a − 5d = 30 for d. Show your work.
anonymous
 one year ago
Help please! Solve 2a − 5d = 30 for d. Show your work.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You have to move the 2a to the other side. It's added to 5d, so what operation do you have to use?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0right. so what do will you have after subtracting 2a from both sides of the equation?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0do i subtract 2a from 5d or 30?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0From the 30. It helps to line up like terms so you can see what cancel. dw:1443035502144:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0a  5d = 28a ? sorry I'm terrible at this :/

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no worries. You can only combine terms with the same variable (aka like terms). So on the right side, you can't subtract 2 from the 30 because the 2 has an \(a\) and the 30 does not. So when you subtract, it's going to stay \(302a\). On the left side, you have two like terms \(2a\) and \(2a\). When you subtract them you get \(0\). In the same way that \(2  2 = 0\), when you put variable there \(2a2a=0\)dw:1443036063501:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so now all that's left is to divide by 5 because it's mulitplied by d.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1443036224256:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thank you so much!! @peachpi
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