Answer:
x=7
Explanation:
To solve this the first thing we do is to use the distributive property: 3x+12x+8=113. Next, we combine the like terms: 3x+12x+8=113 then we simplify 15x+8=113. Then we subtract 8 from both sides of the equation: 15x=105. Then we divide by 15 to get the answer: 15x/15=105/15 which would give us: x=7.