1 48-3 x =16 5 x ×(5+1)=60 99 x =100 36÷ x=18 X- 27 X=43 2X + 25 = 35 70%X + 20%X = 3.6 X×53 =20×41 x÷6=12 56-2 x =20 4y+2=6 x+32=76 X+ 83 X= 121 5X- 3× 215 =75 32 X÷ 41 = 12 25% + 10X = 54 16+8x=40 2x-8=8 4x-3×9=29 3x+6=18 6X+5 =13.4 834143X 3X= 83 X - 15%X = 68 2 54-X=24 7X=49 126÷X=42 8x-3x=105 X÷72 =167 X+87 X=43 4X- 6×32 =2 125 ÷X= 310 2(x+3)=10 12x-9x=9 56x-50x=30 5x=15 (x-5) 53 X = 722598 X = 61 ×5116 X÷ 356 =4526 ×2513 4x- 3 × 9 = 29 23y÷ 23=23 4x-20=0 80y+20=100-20y 78-5x=28 103 X- 21× 32 =4 21 x + 61 x = 4 6X+5 =13.4 25 X-13 X= 310 3 53x-90=16 2x+9x=11 12(y-1)=24 80÷ 5x=100 5X=1915218 X=154 X÷54 =2815 4χ-6= 38 32 X÷41 =12 19y+y=40 25-5x=15 79y+y=80 7x÷ 8=6 X÷356 =4526 ÷2513 X-0.25=414X =30% 53 X=7225 98 X=61 ×5116 42x+28x=140 65x+35=100 9÷ (4x)=1 20x=40 – 10x 4 4+0.7X=102 32 X+21 X=42 X+41 X=105 X-83 X=400 80y-90=70÷ 30 78y+2y=160 88-4x=80-2x 65y-30=100 X-83 X=400 X-0.125X=8 X3 6 = 43 X+37 X=18 X×( 16 + 38 )=1312 x- 0.375x= 65 x×32 +21 =4×83 X-X= 12 0.36× 5- 34 x = 35 23 (x- 4.5) = 7 12 x- 25%x = 10 5 X-2.4× 5= 8 79.4+X=95.5 2X+55=129 7 X=63 X-54.3=100 73 5 x:10=41 :31 0.4:x=1.2:2 4.21 2 =x3 21 :51 =41 :x 0.8:4=x:8 43 :x=3:12 1.25:0.25=x:1.6 92 =x8 x3 6 = 35 4 x: 32 =6: 2 52 4 x5.4=2.26 45:x=18:26 21 x + 61 x = 4 1 03 X-21× 32 =4 2 041xx 8)6.2(2x 0.612= 1.5x 34∶12= x∶45 1112∶45= 2536∶x x∶114= 0.7∶12 10∶ 50=x∶ 40 1.3∶ x=5.2∶ 20 x∶ 3.6=6∶ 18 13∶120=169 ∶ x 6 2.8:4.2=x:9.6 1 01 :x=81 : 41 2.8:4.2=x:9.6 x:24= 43 : 31 8:x= 54 : 43 85 : 61 =x: 1 21 0. 6∶ 4= 2.4∶ x 6∶ x=15∶13 32 X÷ 41 = 12 6X+ 5 =13.4 834143X 3X= 83 二 . ...