Answer: 2(x+5)=20
Explanation:
2 times the SUM of a number and 5... so that means we're multiplying 2 and two other numbers, so use parentheses. x can represent the unknown number.
2(x+5) <---- 2 times the WHOLE SUM of x and 5.
"is 20" meaning that entire thing is equal to 20.
so....
2(x+5)=20