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lisov135 [29]
4 years ago
5

A system of equations is shown below. Find the solution by using substitution.

Mathematics
1 answer:
ASHA 777 [7]4 years ago
5 0

Answer:

a) (-2, 0)

Step-by-step explanation:

x + 2 = 3x + 6

-3x - 3x

___________

−2x + 2 = 6

- 2 - 2

_________

4 = −2x

_ ___

−2 −2

-2 = x [Plug this back into both equations above to get the y-coordinate of 0]; 0 = y

I am joyous to assist you anytime.

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Answer:

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Step-by-step explanation:

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4 years ago
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The equation 2/5d-1=3/5d-3 represents the number of dimes
ollegr [7]

Answer:

d=10

Step-by-step explanation: step 1: 2/5d-1 = 3/5d-3           add 3 to both sides

                                                                   +3          +3

                                            step 2:  2/5d+2 = 3/5d subtract 2/5d to both sides

                                                         -2/5d       -2/5d

                                            step 3:         2 =  1/5d       multiply 5/1 to both sides

                                                              * 5/1 = *5/1

                                                                10 = d

                                                 

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3 years ago
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7.8 + 2(0.75m + 0.4) = -6.4m + 4(0.5m - 0.8)
sesenic [268]

Answer :

m = 13.4/4.65

Step by step :

7.8 + 2(0.75m + 0.4) = -6.4m + 4(0.5m - 0.8)

7.8 + 2.75m + 0.8 = -6.4m + 4.5m - 4.8

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4.65m = 13.4

m = 13.4/4.65

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4 years ago
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