估一估,算一算
(射洪县)解方程.2.8x﹣4.6=17.8.
(旅顺口区)计算.
(旅顺口区)直接写得数 (1)=(2)=(3)= (4)﹣= (5)=
(海州区)解方程2x+2.7=24.7x﹣x==.
(葫芦岛)求未知数x. 7x+5×0.7=8.4 :36%=:x.