9+9x9= ( )+( )x9=900000 18+98x9= （ ）+（ ）x9=9000000 117+987x9= ( )+( )x9=90000000 Find the law

9+9x9= ( )+( )x9=900000 18+98x9= （ ）+（ ）x9=9000000 117+987x9= ( )+( )x9=90000000 Find the law

9+9x9=90
18+98x9=900
117+987x9= 9000
1116+9876x9= 90000
(11115)+(98765)x9=900000
(111114)+(987654)x9=9000000
(1111113)+(9876543)x9=90000000

Is 0.111 cycle equal to one ninth? 1.111 cycle x9 = 0.999 cycle, and one ninth x9 = 1

0.111 cycle equals one ninth,
0.. 111 cycle, x9 = 0.999 cycle = 1

2×-1.8=×+2.4 3×-2（10-×）=15 （2×+3）×2=5×-4 18÷4×-3=9 （4-×）x7=（×-4）x9

2×-1.8=×+2.4
x=2.4+1.8
x=4.2
3×-2（10-×）=15
3x-20+2x=15
5x=35
x=7
（2×+3）×2=5×-4
4x+6=5x-4
5x-4x=6+4
x=10
18÷4×-3=9
18-12x=36x
48x=18
x=3/8
（4-×）x7=（×-4）x9
16(x-4)=0
x=4