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3 years ago

PLEASE HELP!!

Mathematics

1 answer:

andrezito [222]3 years ago

4 0

Answer:-1/9,1/27,-1/81

Step-by-step explanation:

We are dividing by -3 each time.

3/-3=-1

-1/-3=1/3

1/3÷-3=-1/9

-1/9÷-3=1/27

1/27÷-3=-1/81

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Answer:

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b) x= -3

c)y= 0

Step-by-step explanation:

a) 3-4x=-7-4x

$3-4x=-7-4x\\Adding \ 4x \ on \ both \ sides\\3-4x+4x=-7-4x+4x\\3-0=-7\\Adding \ -3\\3-0-3=-7-3\\0\neq -10$

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$7(y-3)=6y-21\\7y-21=6y-21\\Adding \ -6y \ on \ both \ sides\\7y-21-6y=6y-21-6y\\y=-21+21\\y=0$

So, this equation has one solution.

1. Write equation with no solution. 3-4x=-7-4x (check solution of a)

2. Write equation with one solution. 7(y-3)=6y-21 (check solution of c)

3. Write equation with infinite solution. 2x + 3 = x + x + 3

solving:

2x+3=2x+3

2x-2x+3=3

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When both sides are equal, the equation has infinite solutions.

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