What is the number?
A number is tripled and then 7 is added to the result. The final answer is the same as if the number were doubled and then 13 was added.
What is the number?
Word Problem
A bridge is built across a river. One quarter of the bridge is over the left bank of the river and one third of the bridge is over the right bank. The river is 120 m wide. How long is the bridge?
Let the number be x.
ReplyDeleteTripled and add 7:
3x + 7
Doubled and add 13:
2x + 13
Now set the two expressions equal:
3x + 7 = 2x + 13
Step 1: Subtract 2x from both sides:
x + 7 = 13
Step 2: Subtract 7 from both sides:
x = 6
Final Answer:
The number is 6.