Answer:
Step-by-step explanation:
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12+3.4x-5.4x=x
We move all terms to the left:
12+3.4x-5.4x-(x)=0
We add all the numbers together, and all the variables
-3x+12=0
We move all terms containing x to the left, all other terms to the right
-3x=-12
x=-12/-3
x=+4
