Missing number puzzle
A number is multiplied by 4, then 7 is added. The result is the same as when the number is multiplied by 6, then 3 is taken away.
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
ReplyDelete4x + 7 = 6x - 3
Add 3 to both sides:
4x + 10 = 6x
Subtract 4x from both sides:
10 = 2x
Divide both sides by 2:
x = 5
Final Answer: 5