48-3 x =16 5 x ×(5+1)=60 99 x =100 36÷ x=18223331X- X= 2X + = 70%X + 20%X = 3
6X×=20×7554 x÷6=12 56-2 x =20 4y+2=6 x+32=76X+ 38 X=121 5X16+8x=40 2x-8=8 4x-3×6X+5 =13
4-3× 5521=79=29 3x+6=1834 X 134 823 X÷ 14=12 25% + 10X =3X= 385445X - 15%X = 68154-X=24 7X=49 126÷X=42 8x-3x=10512327732X÷=X+X= 4X-6×=2÷X=510716843 2(x+3)=10 12x-9x=9 56x-50x=30 5x=15325 85 X = 72 9 X =23y÷ 23=23 4x-20=0 80y+20=100-20y 78-5x=28310 X-21× 23 =4(x-5)16×1651X÷ 635= 2645× 1325 4x-3 ×9 = 2912x + 16x = 4 6X+5 =13
425 X-133 X=10253x-90=16 2x+9x=11 12(y-1)=24 80÷ 5x=1005X=15 819 21X= 415 X19y+y=40 25-5x=15 79y+y=80 7x÷X÷ 62635=45÷ 132542x+28x=140 65x+35=100 9÷÷ 41525=284χ-6=383X÷ 14=12 8=61 X4 4=30%32581165X=729X=6×51(4x)=1 20x=40 – 10x3 X-0
25=4+0
7X=1022113X+X=42 X+X=105X- X=400324880y-90=70÷ 30 78y+2y=160 88-4x=