Question

数学题 2x＋60%x=7.8 x-40%x=300 70%x+50=260 101÷1

Answer 1

(1)2.6x = 7.8 解得x = 3

(2)0.6x = 300 解得x = 500

(3)0.7x = 210 解得x = 300

(4)看不清楚

(5)0.85x = 18.7 解得x = 22

(6)(2.08 + 1.12)/0.2 = 5.6

(7)2.75x = 1 解得x = 4/11

(8)1.3x = 390 解得x = 300