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15x+15*2/3+15=15*2x+15*1/5
15x+10+15=30x+3
15x+25=30x+3
15x-30x=3-25
-15x=-22/(-15)
x=22/15
b)x-2/3+x+2/2=x-1/*6
6x-6*2/3+6x+6*2/2=6x-6
6x-4+6x+6=6x-6
12x+2=6x-6
12x-6x=-6-2
6x=-8/6
x=-8/6
c)1/3x+2/3=2/5(x+2)/*15
15*1/3x+15*2/3=15*2/5(x+2)
5x+10=6(x+2)
5x+10=6x+12
5x-6x=12-10
-x=2/(-1)
x=-2
15x+10+15=30x+3
-15x=-22 |÷(-15)
x=22/15
b) x-⅔+x+2/2=x-1 |×6
6x-4+6x+6=6x-6
6x=-8 |÷6
x=-1⅓