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vodka [1.7K]
3 years ago
5

How many solutions do −2(3x−10)+8x=7x+20+7x have

Mathematics
2 answers:
Nina [5.8K]3 years ago
8 0

Answer:

x=0

Step-by-step explanation:

Serhud [2]3 years ago
8 0
2(3x-10)+8x=7x+20+7

We move all terms to the left:

-2(3x-10)+8x-(7x+20+7)=0

We add all the numbers together, and all the variables

-2(3x-10)+8x-(7x+27)=0

We add all the numbers together, and all the variables

8x-2(3x-10)-(7x+27)=0

We multiply parentheses

8x-6x-(7x+27)+20=0

We get rid of parentheses

8x-6x-7x-27+20=0

We add all the numbers together, and all the variables

-5x-7=0

We move all terms containing x to the left, all other terms to the right

-5x=7

x=7/-5

x=-1+2/5
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<u>4.</u> Since angles 1 and 2 are supplementary, this means they add up to 180 degrees. Make them add up to 180 in an equation and solve for a. Substitute a back into m∠2 to find your answer.

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______________________________________________________________

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Step-by-step explanation:

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