In an equation-from-words question, identify what is multiplied before you combine the parts. A sum is the result of addition, and “is” supplies the equal sign. The tempting trap is doubling the whole sum rather than only the number. Attach each operation to exactly the quantity the words name.
Hints
- Hint 1
The variable stands for the unknown number. Twice that number means two copies of . What expression represents the doubled number?
- Hint 2
A sum means addition. Add the separately named once, then use “is” to set the result equal to the stated total. Which part should the multiply?
Step-by-step
Translate each phrase
Step 1Translate twice a number
No Desmos needed. You're choosing an equation, not solving one.
Twice means multiply the variable , which stands for the unknown number, by :
- Step 2
Add the second part
A sum means addition. The is a separate part, so add it once to :
Writing would double the too, but the words only double .
- Step 3
Set the sum equal to the total
The word “is” tells you the sum equals the given total, . So the equation, a statement that two amounts are equal, is:
Choice C.