a.5a+4a=9a
b.2x+3x+10=5x+10
в.1.5+а+2.5а=1.5+3.5a
г.6у+8+6у=12y+8
д.7m+ m=8m
e.3/8n+ 5/8n+1\3n=1(целая)1\3n

18x-3x+5x=20x
2y-9y=-7y
1.2c-0.3c+5=0.9c+5
2a-15-a+6=a-9
t+6.3t-2.1t=5.2t
5x-5+3x-4x=4x-5
-a-a-a-a=-4a
-2n-2n-2n=-6n
1/3x+1/3x+1/3x=x