Answer: 5
Explanation:
x+3x−2=18
x+3x+−2=18
(x+3x)+(−2)=18(Combine Like Terms)
4x+−2=18
4x−2=18
Step 2: Add 2 to both sides.
4x−2+2=18+2
4x=20
Step 3: Divide both sides by 4.
x=5
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