(清原县)求未知数 ①:x=0.3: ②1﹣25% x="0.5" ③6x﹣7.3=19.7.
206+ 598=
42 :="x" :
求未知数X x-x=
(2.4×1.5-1.5)÷0.7
(3.2+3.2+3.2+3.2) ×2.5