Help!!!
Corinne solved the equation below:
5x = 95
5x − 5 = 95 − 5
x = 90
Is Corinne's solution correct? If the solution is incorrect, explain why it is incorrect and show the correct steps to solve the equation.
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OpenStudy (anonymous):
5x = 95
how would you get x by itself
OpenStudy (anonymous):
you would divide 5 on both sides
OpenStudy (anonymous):
that's right. so what does x equal
OpenStudy (anonymous):
19?
OpenStudy (anonymous):
that's correct
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OpenStudy (anonymous):
could you help me with another?
OpenStudy (anonymous):
sure
OpenStudy (anonymous):
An equation is shown below:
6(2x - 11) + 15 = 21
Write the steps you will use to solve the equation and explain each step.
OpenStudy (anonymous):
ok, expand 6(2x-11)
OpenStudy (anonymous):
Expand?
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OpenStudy (anonymous):
multiply 6 into the brackets
OpenStudy (anonymous):
6(2x) + 6(-11)
OpenStudy (anonymous):
12x + -66
OpenStudy (anonymous):
12x - 66 + 15 = 21
OpenStudy (anonymous):
can you solve it from here?
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OpenStudy (anonymous):
i think so. give me a min
OpenStudy (anonymous):
\[-66+15=-51\]
OpenStudy (anonymous):
12x-51=21
OpenStudy (anonymous):
ok, what's the next step?
OpenStudy (anonymous):
12x=51+12?
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OpenStudy (anonymous):
21, not 12
OpenStudy (anonymous):
12x=51+21
12x=72
OpenStudy (anonymous):
and then divide 12 on both sides
x=6
OpenStudy (anonymous):
well done
OpenStudy (anonymous):
Thanks you!
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