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30-19x-(20-15x)=10
We move all terms to the left:
30-19x-(20-15x)-(10)=0
We add all the numbers together, and all the variables
-19x-(-15x+20)+30-10=0
We add all the numbers together, and all the variables
-19x-(-15x+20)+20=0
We get rid of parentheses
-19x+15x-20+20=0
We add all the numbers together, and all the variables
-4x=0
x=0/-4
x=0
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