Mathematics
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Cupcake123456:
9x+18+3x=1 ???????/
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Cupcake123456:
@MrMudd183
MrMudd183:
i gotta work this one out
Cupcake123456:
ok
MrMudd183:
Cupcake, how do you want the problem solved?
Cupcake123456:
we gotta figure out what number =x
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MrMudd183:
ok
Cupcake123456:
@Shadow
Shadow:
Solve for x by isolating it, which is just getting x on one side of the equals sign
\[x = ?\]
Shadow:
Let's begin with like terms.
9x + 3x = ?
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Cupcake123456:
12? 9+3
Shadow:
\[9x + 3x = 12x\]
Shadow:
Therefore we can rewrite
\[9x+18+3x=1\]
as:
\[12x + 18 = 1\]
Shadow:
We want x alone on one side. What do you think we should do next?
Cupcake123456:
1.41 ???????
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Shadow:
That's not the next step..
Cupcake123456:
next step is the evaluate the 18 ?
Cupcake123456:
to -18?
Shadow:
Yes, subtract 18 from both sides.
Cupcake123456:
12x=17
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Shadow:
Not quite
Shadow:
You're missing something.
Shadow:
Think of 1 on a number line. You went left, 18 places. That puts you, where?
Cupcake123456:
12/12x=17/12?
Shadow:
|dw:1556115759734:dw|
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Shadow:
^my high effort number line
Shadow:
@Cupcake123456 ?
Cupcake123456:
ooookkkk...
Cupcake123456:
|dw:1556115931801:dw|
Shadow:
1 - 18 = -17
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Cupcake123456:
yeah..
Shadow:
Then yes, divide by 12
Shadow:
And you're done
Shadow:
Just to be clear, 1.41 is incorrect.
Cupcake123456:
sooo whats the answer?
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Cupcake123456:
-17 / 12?
Shadow:
Yes
Cupcake123456:
-1.41?
Shadow:
It depends on if your teacher wants a fraction or a decimal rounded to the hundredths place
Shadow:
-1.41 is the latter, whilst the former is -17/12
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Cupcake123456:
she wants a decimal
Shadow:
k then go with that if that's the place she wants
Cupcake123456:
Ok thank u
Shadow:
No problem