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DanielleElmas [232]
3 years ago
7

Show your work and solve 9 - 2b + 6 = -3(b+5) + 4b

Mathematics
1 answer:
Leviafan [203]3 years ago
4 0

Answer:

0

Step-by-step explanation:

9 - 2b + 6 = -3(b+5) + 4b

15 - 2b = -3b - 15 +4b

15 - 2b =  -15 + b

` move -15 over to the right and -2b to the left `

0 = -b

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What is the solution of the system defined by y= -x+5 and 5x + 2y = 14?
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zlopas [31]

a. The solution is (0,2)

b. The first expression will be easier to substitute as in the first expression the variable y is already isolated on one side of the equation so we can easily put 5x+2 in place of y in equation 2.

Step-by-step explanation:

Given equations are:

y = 5x+2\ \ \ \ Eqn1\\12.5x+2.5y = 5\ \ \ \ Eqn2

a. Solution

Putting y = 5x+2 in equation 2

12.5x+2.5(5x+2) = 5\\12.5x+12.5x+5 = 5\\25x +5 = 5\\25x = 5-5\\25x = 0\\x = 0

Putting x = 0 in equation 1

y = 5(0)+2\\= 0+2 = 2

Hence,

The solution is (0,2)

b: Reason:

The first expression will be easier to substitute as in the first expression the variable y is already isolated on one side of the equation so we can easily put 5x+2 in place of y in equation 2.

Keywords: Linear equation, substitution

Learn more about linear equations at:

  • brainly.com/question/4786449
  • brainly.com/question/4793866

#LearnwithBrainly

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