Answer:
x= -2/33
Step-by-step explanation:
let me know if it is right
The answer is A. 42
Solution:
Let x= ones digit, y=tens digit
1st condition (original number) : 7(x+y)=10y + x
2nd condition (new number by reversing the digits): 18+x+y=10x+y
simplifying:
1st condition: 6x=3y
2nd condition: x=2
substituting x=2 to 6x=3y
y=4
6x - 10 = 4x
+10 +10
6x = 4x + 10
- 4x -4x
2x = 10
x = 5
6(5) - 10 = 4×5
30-10 = 20
20=20
