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(13x+45)+(19x+3)=
We move all terms to the left:
(13x+45)+(19x+3)-()=0
We add all the numbers together, and all the variables
(13x+45)+(19x+3)=0
We get rid of parentheses
13x+19x+45+3=0
We add all the numbers together, and all the variables
32x+48=0
We move all terms containing x to the left, all other terms to the right
32x=-48
x=-48/32
x=-1+1/2
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