Answer:
[tex]\boxed{\boxed{\sf 5x+35}}[/tex]
Step-by-step explanation:
[tex]\sf 3x+15+2x+20[/tex]
→ Combine like terms:
[tex]\sf 3x+2x+15+20[/tex]
- [tex]\sf (3x+2x)\leadsto5x[/tex]
- [tex]\sf (15+20)\leadsto 35[/tex]
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