Answer:
*step by step*
Step-by-step explanation:
If he erases one of the digits in a 4-digit number, then only 3 remain, not four.
If he erased the first digit, then it must have been 1-9, so the total is in the range 11 - 19
otherwise the digit could have been 0-9 in which case the total is in the range 10-19
3+2 ( 2x + 8 ) = 1 is equivalent to ...
fraction : X = -9/2
Decimal -4.5
