9*50+x*90=9*140

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Solution for 9*50+x*90=9*140 equation: 



9*50+x*90=9*140

We move all terms to the left:

9*50+x*90-(9*140)=0

We add all the numbers together, and all the variables

x*90+9*50-1260=0

We add all the numbers together, and all the variables

x*90-810=0

Wy multiply elements

90x-810=0

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

90x=810

x=810/90

x=9

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