Examples of equations for practice for 13 year olds - page 2 of 96
Number of problems found: 1913
- The mean
The mean of four numbers is 5, and the mean of three different numbers is 12. What is the mean of the seven numbers together? - Solve 17
Solve a reciprocal equation: 18 36/64=9:n - Year salary
2/5 of a man's salary is 40,000. What is his salary? - Two numbers 7
The sum of two consecutive even numbers is 30. Find the numbers. - Substitution
Solve equations by substitution: x+y= 11 y=5x-25 - Perpendicular
Find the slope of the line perpendicular to the line p: y = 8x +6. - Fractions: 6543
Solve the equation with fractions: x / 3-x / 8 = x / 12 + x / 8 - Multiplied and subtracted
When a number is multiplied by ⅔ and subtracted from 7, the result is 2⅓. What is the number? - Six numbers
The average of 6 numbers is 3.95. the average of two of them is 3.4, while the average of the other two is 3.85. What is the average of the remaining two numbers? - Equation - inverse
Solve for x: 7: x = 14:1000 - Six years
In six years, Jan will be twice as old as he was six years ago. How old is he? - Proportion
Write the following proportion: Eight is to 64 as to 2 is to x - Reciprocal equation
Determine the root of the equation: 9/x-7/x=1 - Inequality: 33081
Write the smallest natural number satisfying the inequality: 5. (2x-1) - Determine 3861
Determine the value of f: 0.49^f = 0.7 - (x-1) 3535
1/5 (x-1) -7 = 17-3 (1-x) 2/3 (y-2) -4y = 2- (1 + 2y) - Fraction number
If two-thirds of a number is added to one-ninth of the same number, the result is 7. Find the number. - I read
I read 24 pages of a book. Three-fifth part of the book is still left for reading. How many pages does the whole book have? - The fractions
The fractions 10/3 and 10/X give the same answer when multiplied as they do when they are added. Find the value X. - The product 12
The product of 2 1/4 and another fraction is 7 1/2. Find the other fraction.
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