Question

5a+8a=


45b-32b=


890n+786n=


h+786h=


135f-34f=


55x-34x-7=

Answer 1

$\displaystyle 1)5a+8a=(5+8)a=13a\\\\ 2)45b-32b=(45-32)b=13b\\\\ 3)890n+786n=(890+786)n=1676n\\\\ 4)h+786h=1h+786h=(1+786)h=787h\\\\ 5)135f-34f=(135-34)f=101f\\\\ 6)55x-34x-7=(55-34)x-7=21x-7$