Question

9-2.1 x = -(x+0.9) solve the following questions​

Answer 1

Answer:

Step-by-step explanation:

9-2.1x=-(x+0.9)

We move all terms to the left:

9-2.1x-(-(x+0.9))=0

We calculate terms in parentheses: -(-(x+0.9)), so:

-(x+0.9)

We get rid of parentheses

-x-0.9

We add all the numbers together, and all the variables

-1x-0.9

Back to the equation:

-(-1x-0.9)

We get rid of parentheses

-2.1x+1x+0.9+9=0

We add all the numbers together, and all the variables

-1.1x+9.9=0

We move all terms containing x to the left, all other terms to the right

-1.1x=-9.9

x=-9.9/-1.1

x=+9

Answer 2

Answer:

9-2.1x=-(x+0.9)

9-2.1x=-x-0.9

9+0.9=2.1x-x

9.9=1.1x

9.9/1.1=x

9=x

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