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3 years ago

-4(6-b)=4 how to solve this problem?

Mathematics

2 answers:

Harlamova29_29 [7]3 years ago

6 0

Answer:

b = 7

Step-by-step explanation:

-4(6-b)=4

Distribute the -4

-24+4b = 4

Add 24 on both sides

4b=28

Divide by 4 on both sides

b=7

Kaylis [27]3 years ago

3 0

You distribute -4 to each in the parentheses then you get -24 - 4b = 4 then you add 24 on both sides and get -4b = 28 then you divide each side by -4 and it equals -7

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Solve the following system using elimination:
{7 x + 2 y = -19 | (equation 1)
{2 y - x = 21 | (equation 2)

Add 1/7 × (equation 1) to equation 2:
{7 x + 2 y = -19 | (equation 1)
{0 x+(16 y)/7 = 128/7 | (equation 2)

Multiply equation 2 by 7/16:
{7 x + 2 y = -19 | (equation 1)
{0 x+y = 8 | (equation 2)

Subtract 2 × (equation 2) from equation 1:
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{0 x+y = 8 | (equation 2)

Divide equation 1 by 7:
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{0 x+y = 8 | (equation 2)

Collect results:
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