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True. 9 + 8 + 1= 18 and 9 + 1 + 8 =18.

8+1 equals 9

Yes, it is true.

-1

The answer to 1 over 2x plus 13 equals 9 is x equals -8.

1

== 1+8== 9 == ---- One plus eight equals nine.

(1, 9)

7

42

89

x + 9 = 8 Therefore, x = 8 - 9 x = -1

4+1=5. Plus 4 equals 9. Plus 77685769844446473 equals 77685769844446482. Plus 3 equals 77685769844446485. Plus 8 equals 77685769844446493. Plus 1 equals 77685769844446494. Plus 9870998342523322424 equals 1064785604097768918. Plus 4 equals 1064785604097768922.

19

True. Addition of natural numbers obeys associative and commutative property.

26

1 1/8, 9/8, 1.125

45

-2x+9=x+1-x........-x-3x+9=1.....-9...-9-3x=-8-3x/-3 | -8/-3\ /........\ /x=8/3

Tautology?

2x + 9 = 6x + 1 9 - 1 = 6x - 2x 8 = 4x x = 2

-6+5, -9+8, -2+1, ect.

read upside down so, 8+1=6 will become 9=1+8 (and 9=1+8 is mathematically correct)

144 9+7 = 16 and 9*16 = 144

2x + 1 = 9 2x = 9 - 1 2x = 8 2x/2 = 8/2 x=4