a)x/2-2/5=1/10 b)15/x-1/3=28/51 c)3/4+x/3=1/4-3/-5
x/2=1/10+2/5 15/x=28/51+1/3 3/4+x/3=1/4+3/5
x/2=1/10+4/10 15/x=28/51+17/51 3/4+x/3=5/15+12/15
x/2=1/2 15/x=15/17 3/4 +x/3=17/15
⇒x=1 ⇒x=17 x/3=17/15-3/4
x/3=68/60-45/60
x/3=23/60
⇒23x=60x3
⇒23x=180
⇒x=23/180