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19x+(3*0.75)x=900
We move all terms to the left:
19x+(3*0.75)x-(900)=0
We add all the numbers together, and all the variables
19x+(2.25)x-900=0
We multiply parentheses
19x+2.25x-900=0
We add all the numbers together, and all the variables
21.25x-900=0
We move all terms containing x to the left, all other terms to the right
21.25x=900
x=900/21.25
x=42+1/2.8333333333333
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