kissme
8x-y+5z from the sum of 2x+3y - 6z and 5x-3y
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tishara429
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kissme
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pls complete solution :)
tishara429
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Callisto
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the sum of 2x+3y - 6z and 5x-3y
= (2x + 3y -6z) + (5x - 3y)
= 2x + 5x +3y - 3y -6z
= 7x - 6z
To get 8x-y+5z from the sum of 2x+3y - 6z and 5x-3y, we need to add something. Let that something be A
[ (2x + 3y -6z) + (5x - 3y) ] + A = 8x-y+5z
( 7x - 6z ) + A = 8x - y + 5z
Subtract both sides by 7x
( 7x - 6z ) + A - 7x = 8x - y + 5z -7x
A - 6z = x - y + 5z
Add 6z to both sides
A - 6z + 6z = x -y + 5z + 6z
A = x - y + 11z
So, to get 8x-y+5z from the sum of 2x+3y - 6z and 5x-3y, we need to add x - y + 11z.
Callisto
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I hope I didn't misinterpret the question :(
tishara429
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yes
tishara429
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you did fine
kissme
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THANKS
kissme
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so whats the answer..?
tishara429
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15
Callisto
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@tishara429 Can you explain your answer? I don't understand how you got your answer.
tishara429
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add
Callisto
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Do you mind explaining it detailedly? Sorry that I'm slow!
tishara429
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ok you add the number which equals the answer u got and then you will have the correct answer so thats how you solve the question.
Callisto
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But there are some unknowns there, you can't add them directly because they are NOT the like terms, right?
tishara429
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oh i see then u have to divide