Answer:
The number is -6
Step-by-step explanation:
"the sum twice a number and 5" is 2x + 5, where x is the "number."
"is 13 less than the opposite of a number" is = -x-13
Put the two parts together:
2x + 5 = -x - 13
3x = - 18
x = -6
The sum of twice a number is 2*(-6) = -12
and 5: -12 + 5 = -7
is 13 less than the opposite of a number is -(-6) - 13 = -7
-7 = -7 YES
The number is -6
