0.7x+0.4=0.9x-0.4

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Solution for 0.7x+0.4=0.9x-0.4 equation: 



0.7x+0.4=0.9x-0.4

We move all terms to the left:

0.7x+0.4-(0.9x-0.4)=0

We get rid of parentheses

0.7x-0.9x+0.4+0.4=0

We add all the numbers together, and all the variables

-0.2x+0.8=0

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

-0.2x=-0.8

x=-0.8/-0.2

x=+4

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