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Julli [10]
3 years ago
15

Evaluate the equation.

Mathematics
1 answer:
e-lub [12.9K]3 years ago
5 0

Answer:

a = 6

Step-by-step explanation:

subtract 6.6 from both sides and you get the answer

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Tell which equation you would use to isolate a variable in order to solve the system using substitution. Explain your reasoning.
vampirchik [111]
2x+y=-10
Multiply both side by 3
2x*3+y*3=-10*3
6x+3y=-30

3x-y=0
Multiply both side by 2
3x*2-y*2=0*2
6x-2y=0
Next, use substitute property
6x+3y=-30
    -
6x-2y=0
    =
y=-30
3x-y=0
Substitute y with -30
3x-30=0
Add 30 to each side
3x-30+30=0+30
3x=30
Divided both side by 3
3x/3=30/3
x=10, so the solution pair is (10,-30). In this case, there is the first way to solve these two equation.
Then, I would use equation 3x+1.5y=-15 in this question by multiply 2x+y=-10 by multiplying both side by 3/2 to eliminate x and to solve variables for y. Hope it help!
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3 years ago
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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

35=-2x-15

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Step-by-step explanation:

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