(1970+x)*0.4=20*x

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Solution for (1970+x)*0.4=20*x equation: 



(1970+x)*0.4=20x

We move all terms to the left:

(1970+x)*0.4-(20x)=0

We add all the numbers together, and all the variables

(x+1970)*0.4-20x=0

We add all the numbers together, and all the variables

-20x+(x+1970)*0.4=0

We multiply parentheses

-20x+0.4x+788=0

We add all the numbers together, and all the variables

-19.6x+788=0

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

-19.6x=-788

x=-788/-19.6

x=40+4/19.6

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