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Mathematics 8 Online
olivia14:

How many dimes did Jenna have?

olivia14:

Shadow:

I think you do d + q = 38 0.10d + 0.25q = 6.95 Then solve as a system of equations

Shadow:

d being the number of dimes and q being the number of quarters

olivia14:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Shadow I think you do d + q = 38 0.10d + 0.25q = 6.95 Then solve as a system of equations \(\color{#0cbb34}{\text{End of Quote}}\) which one do u subtract from both sides?

Shadow:

It doesn't matter which one you start with. Just isolate a variable in either equation (obviously the first one is easier), then input it into the second equation. Solve for the variable there, then input that back into the first equation. If you isolate q then you can solve for d first.

olivia14:

im still confused 🤔😅

olivia14:

can u break it down into smaller words lol

Shadow:

\[d + q = 38\] \[0.10d + 0.25q = 6.95\] Let's start with the first one \[d + q = 38\] Subtract d from both sides \[q = 38 - d\] We throw that into the 2nd equation \[0.10d+0.25q=6.95\] becomes-> \[0.10d+0.25(38−d)=6.95\] Now it's just order of operations where you solve for d

olivia14:

would it equal 17?

Shadow:

Yes

olivia14:

okay thank you

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