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Zepler [3.9K]
3 years ago
10

Given: 2x + 30 = -4(5x -2); Prove: x = -1

Mathematics
1 answer:
Lady_Fox [76]3 years ago
6 0
2x + 30 = -20x + 8
2x + 20x = 8 - 30
22x = -22
x = 1
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Step-by-step explanation:

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Tomas used incorrectly the rule of signs, the expression should be simplified as follows:

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<h3></h3><h3>What mistake did Tomas likely make?</h3>

Here Tomas wants to perform an addition between two numbers:

-2.6 + (-5.4)

And the outcome that Tomas gets is:

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Here his mistake seems to bee that he thought the second number was a positive number, and he solved the operation:

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If you want to learn more about the rule of signs:

brainly.com/question/13333620

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