4分之3x+5-12分之x+3=6分之2x+3-3; 3(3x+5)-(x+3)=2(2x+3)-36; 9x+15-x-3=4x+6-36; 4x=-42; x=-21/2; 4分之3(x+5)-12分之x+3=6分之2x+3-3; 9x+45-x-3=4x+6-36; 4x=-72; x=-18;