Answer:
x=11/12
Explanation:
-3x+9=3(2x+3)+3(x-4)+1
distribute first
-3x+9=6x+9+3x-12+1
simplify the right side
-3x+9=9x-2
add 3x to both sides
9=12x-2
add 2 to both sides
11=12x
divide both sides by 12
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