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+