Building equations from words

solutions
 
Worded exercise
Equation
Solution
A certain number is added to 7 and the result multiplied by 8 to get a final answer of 88. Solution
Stephen wanted to save money for a Christmas present. He saved a certain amount of money every week for 18 weeks and his parents gave him $120 to bring the total to $318. How much did Stephen save every week?
Three angles of a triangle are "x", "x + 10" and "x + 20" degrees. What are the 3 angles?
Hint. The sum of all angles of a triangle is 180 degrees.
The sum of three consecutive numbers is 33. Find each number.
The perimeter of a rectangle is 50m. If the length is 5m longer than the width, find the width of the pool.
A lizard hatches from its egg at a weight of 200 grams. After 10 days it weighs 500 grams. Assuming the lizard grows the same amount each day, how much weight does the lizard put on every day?
John had completed 4 short runs. His average time was 12 seconds. He recorded his first three times which were, 10, 12 and 16 seconds but forgot his fourth. What was John's fourth time?
Natali buys 6 burgers and 3 drinks at a cost of $15. If each drink costs $1 how much is the cost of one burger?