You can combine like terms - combine the terms that have a "t" in them; separately, combine the terms that don't.
SOLVE : 21t + t=
is eassy
3a * * * * * Actually, it is 4a.
If you simplify the equation (s+t+s) the answer is 2s+t
When you simplify 49 plus 37 (49+37), the result is 86.
3x
3n.
2a² + 6a
13a
4b
2x
9a + 1