Question

equação de 1° grau
2y/5 - 3/4 = 3y/20

Answer 1

2y/5 - 3/4 = 3y/20 <=> 
<=>2y/5-3y/20=3/4 <=> 
<=> 8y-3y=15<=> 
<=>5y=15<=> 
<=>y=5 

1-x/2 = -1/3x+2<=> 
<=>-x/2+1/3x = -1+2 <=> 
<=>-3x+2x = -6+12 <=> 
<=>-x= 6 <=> 
<=> x=-6 

X-10/9 +x/6=10<=> 
<=>x+x/6=10+10/9<=> 
<=>54x+9x=540+60 <=> 
<=>63x=600 <=> 
<=> x= 600/63 <=> 
<=> x=200/21 

espero ter ajudado ^^