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5x+8+3x+4=40+8
We move all terms to the left:
5x+8+3x+4-(40+8)=0
We add all the numbers together, and all the variables
5x+3x+8+4-48=0
We add all the numbers together, and all the variables
8x-36=0
We move all terms containing x to the left, all other terms to the right
8x=36
x=36/8
x=4+1/2
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