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5x+4x+19=5x+3x
We move all terms to the left:
5x+4x+19-(5x+3x)=0
We add all the numbers together, and all the variables
5x+4x-(+8x)+19=0
We add all the numbers together, and all the variables
9x-(+8x)+19=0
We get rid of parentheses
9x-8x+19=0
We add all the numbers together, and all the variables
x+19=0
We move all terms containing x to the left, all other terms to the right
x=-19
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