6
You get 50.
It is: 6 because (6*7)+8 = 50
The original number is 14.
-79
9
You get 50.
It is: 6 because (6*7)+8 = 50
Let the unknown number be represented by 'n'. Then, (n x 7) + 8 = 50 7n = 50 -8 = 42 n = 42/7 = 6.
To add seven tenths to a number, multiply the number by 1.7. For example, 50 plus seven tenths of 50 is equal to 50 x (1 + (7/10)) = 50 x 1.7 = 85.
Not too sure about your question but let the number be x:- If: 7x+8 = 50 then x works out as 6 But if: 7x = 42+8 then x works out as 7 and 1/7
43
One trick for multiplying by 12 is to multiply the number by 10 and then add two times the number. For example, if you want to multiply 7 by 12, first multiply 7 by 10 to get 70, and then add 7*2=14 to get 84.
40 + 3 50 - 7 43 x 1
The original number is 14.
-79
9
7