1、解方程2X 7 X=32342X + 5=570%X + 20%X = 3.6X 3=20 125%+ 10X = 4545X- 15%X= 68X 3X 1215X 3 5 52 X 1128217343133X=36X 5 =13.4X8844X 2 = 7X 7 X= 34X 6 2 =27168431233 X = 258X = 1 165 X=105729651X 6 = 26 134x3 9 = 291 x + 1 x =3545252643 X 21 2 =41036X 5 =13.42135X- 3X= 104 6 385X=158X= 4X 4= 151921155282 X
2、 1=123 X= 258 X= 1 16345729651X 6 = 26 13X-0.25= 1X =30%354525444+0.7X=1022 X+ 1X=42X+1 X=105324X- 3 X=400X-0.125X=836 =38X431313X+7 X=18X ( 6+8)= 12x 0.375x=56x 2+ 1=4 3X 3X 125 X 2.4 5 8328733210.36 5- 4 x =53 (x- 4.5) = 72 x- 25%x = 104x- 0.8x = 16+620x 8.5= 1.5x- 5 x -4= 2138X 25%X=90X 7X=9(1) 3 +2.4 =6(2)3.5:=5:4.2(3)1.8 =2.45(4) 10 = 2.5 x 0.8(5)6 31.8=7.2(6)17 5 =2.4+315(7) x= 1.2(8) 1=3(9)12.6 52 =845486(10) x = 1.5(11)3 1 = 11.20.6525
