(连山区)解方程.x+=6x﹣2.4x=72.
18.5-(5.2+3.3)÷1.7 (2.5×8)÷(0.1-0.09)
(2.7+12.5)÷0.5-5.6 1.25×16-0.6×25+65
7.28+(1.72-0.5) 2.25×4.8+7.75×4.8
3.8×13+8.7×38[0.85+(9.25+0.65)÷0.2]×20
132-1.05÷10.5+27[4.75+8.4÷(9.2-6.8)]×40