Algebra - practice problems
Algebra is a branch of mathematics that uses not only numbers and characters but also letters to solve operations. For example 3x+5x is 8x. So working with expressions, solving equations, systems of equations.Number of problems found: 6225
- Elimination method
Use the method of elimination to solve the following simultaneous equations. 5a − 2b = 14 2a + 2b = 14 - Horses equation
Some men and an equal number of horses are travelling together. Half the men are riding the horses and the rest are walking alongside them. If the total number of feet on the ground is 70, how many horses are there? - GP - negative term
The first term of a geometric progression is −3 and the square of the second term equals its 4th term. Find the 7th term of the progression. - Last Friday
3/4 of the children were present at school last Friday. If 90 children were present, how many were absent? - Reciprocal in equation
A positive number, when increased by 10, equals 200 times its reciprocal. What is the number? - Horses and hens
In a park, there are some horses and some hens. If the total number of heads is 68 and the total number of legs is 198, find the number of hens in the park. - Expression - two variables
The formula with two variables is given: y = 5x + 38. Solve for x. - Repeating to infinity
How do I express 0.99999999… as a fraction? (nine repeating) Additional questions: Can you write 0.9999… repeating as a fraction? How do you convert 0.9 repeating into a fraction? - Twice the unknown
I am twice a certain number. If 8 is subtracted from me, the result is 6. What am I? - The sum 50 The sum of five consecutive integers is 385. Which one of these five integers is prime?
- LCM and HCF 3 LCM of two integers is 1237. What is their HCF?
- System of equations
Solve the following system of equations: 2x-5y=4 5x-3y=4 - Two games
In a class of 65 students, 30 students play cricket, 20 students play tennis, and 10 students play both games. Then, find the number of students who play neither. - Simple equation 12 Three times a number, divided by 2, plus 5 equals 20. Find the number.
- Numerators and denominators 2 A fraction becomes 2 when 1 is added to both the numerator and denominator and it becomes 3 when 1 is subtracted from both numerator and denominator. Find the difference of numerator and denominator.
- Solve 28 Solve the following system of linear equations: x + 2y - z = -1 3x + 8y+ 2z = 28 4x + 9y + z =14
- Blank fraction Find unknown fraction: 3/5* blank=2/3
- Two sets 2 If X and Y are two sets such that X ∪ Y has 50 elements, X has 28 elements and Y has 32 elements, how many elements does X ⋂ Y have?
- The sum 48
The sum of a number and its reciprocal is 5.2. Find the number. - A positive A positive number plus itself squared is 240. What is the number? Please show your work.
Do you have unsolved math question and you need help? Ask a question, and we will try to solve it. We solve math question.
