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3 years ago

What is the answer to -x+7=8

Mathematics

2 answers:

Troyanec [42]3 years ago

8 0

Answer:

-x+7=8

bring the 7 over.

to do so you must subtract 7 from itself (canceling it out), then also subtract it from 8.

now you have -x=1.

divide -x by -x (or -1) which just gives you positive x.

do the same to the 1 on the other side, giving you

x= -1

Step-by-step explanation:

stira [4]3 years ago

6 0

+
7
=
8
x
+
7
=
8
x+7=8

+
7
−
7
=
8
−
7

Solution
X =1

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1/2 + 5/3 - 1<br>------------------<br> 3/4

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Hey there :)

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↑
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Read 2 more answers

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Answer:

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Step-by-step explanation:

Here n= 20

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Level of Significance.= ∝ = 0.01

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For two tailed test the critical value is z ≥ z∝/2= ± 2.58

The test statistic

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z= 2.84-2.55/0.45/√20

z= 0.1441

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