solve the equations by substitution
method
3x/2-5y/3=-2 , x/3+y/2=13/6
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3x/2-5y/3= -2
9x-10y/6= -2
9x-10y= -2×6
9x-10y= -12
9x= -12+10y
x= -12+10y/9
x/3+y/2=13/6
-12+10y/9/3+y/2=13/6
-12+10y/27=13/6
-24+20y/54=13/6
-144+120y=702
120y=702+144
120y=846
y=846/120
y=141/20
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