One-Step Equation
x+7=10
3
2x-1=7
4
6x-4x+1=7
3
Liam is 3 years older than Noah. The sum of their ages is 15. How old is Noah?
6
The sum of two consecutive numbers is 15. What are the numbers?
7, 8
x-7=10
17
5x+4=9
1
46x-4x-1=7
4/21
Emily is twice as old as Olivia. The sum of their ages is 21. How old is Emily?
14
The sum of three consecutive numbers is 21. What are the numbers?
6, 7, 8
x+7=-10
-17
4x-9=7
4
-6x-1=4x+9
-1
The dog is 4 years older than the cat. The sum of their ages is 10. How old is the cat?
3
The sum of three consecutive odd numbers is 57. What are the numbers?
17, 19, 21
x/3=7
21
6x-10=2
2
-6x-1=-4x+9
-5
A father is 25 years older than his son. The sum of their ages is 47. How old is the son?
11
The sum of five consecutive odd numbers is 135. Find the numbers.
23, 25, 27, 29, 31
3x=7
7/3
-8x-3=13
-2
-6x-1=-4x-9
4
Michael is 7 years older than his cousin, David. The sum of their ages is 35. How old is Michael?
21
The sum of five consecutive even numbers is 90. What are the numbers?
14, 16, 18, 20, 22