0.4=-2(c-1.8)

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Solution for 0.4=-2(c-1.8) equation: 



0.4=-2(c-1.8)

We move all terms to the left:

0.4-(-2(c-1.8))=0



We calculate terms in parentheses: -(-2(c-1.8)), so:

-2(c-1.8)

We multiply parentheses

-2c+3.6

Back to the equation:

-(-2c+3.6)



We get rid of parentheses

2c-3.6+0.4=0

We add all the numbers together, and all the variables

2c-3.2=0

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

2c=3.2

c=3.2/2

c=1+1/1.6666666666667

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