please help on equations i don’t know how to do this so please help me. i’ll put brainliest 
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Hi,
14x - 2x + 3 = 3(5x+9)
12x +3 = 3(5x+9)
12x + 3 = 15x +27
12x = 15x + 24
-3x = 24
3x = -24
x = -8
→ Mai didn't multiplicate 5x first.
→ Noah didn't subtract 15x
✅(◠‿◕)