50k+80k=40k+90k

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Solution for 50k+80k=40k+90k equation: 



50k+80k=40k+90k

We move all terms to the left:

50k+80k-(40k+90k)=0

We add all the numbers together, and all the variables

50k+80k-(+130k)=0

We add all the numbers together, and all the variables

130k-(+130k)=0

We get rid of parentheses

130k-130k=0

We add all the numbers together, and all the variables

=0

k=0/1

k=0

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