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Zinaida [17]
2 years ago
12

Expand: 5 ( n - 1)?? could you please show working out to. Thanks

Mathematics
1 answer:
astra-53 [7]2 years ago
4 0
You expand 5(n-1) by multiplying 5 by n which gives you 5n and then multiply 5 by -1 so that gives you -5 and therefore the answer is 5n-5
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That is easy!! :)
y=3 and x=-7

When you find the factors of something like this, you have to just get the letter alone.

For example: y-3. You have to first write it as y-3=0, then you add 3 from BOTH sides of the = so that you can make the -3 go away and y will be alone. So, it will look like this: y-3+3=0+3. Then, you solve it for y (which just means that you want y by itself on one side of the = ). So, -3+3=0, which means they disappear from that side; since 0+3=3, that's what that side turns into, so what you end up with is y=3

Same thing goes for the x+7 equation:
x+7=0
x+7-7=0-7
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