Solving by substitution Quiz
10 questions · easy to harder · Algebra 1 · score and step-by-step answers
How it works
- 10 questions, about 20 minutes (a timer counts down; you can hide it). Solve it right here: no sign-up.
- 2 questions have choices. For the others you type the answer: a number like 4, −2, 7/2 or 3.5, or for example x = 4, x = 2 or x = −3, (3, 5), 2x + 1. Use ^ for powers (x^2) and sqrt for √. Any form with the same value counts (7/2 = 3.5).
- One question at a time: Back, Next, Mark for review and the question list at the bottom. A calculator is on the screen.
- At the end: your percent and grade, every question right or wrong, why a wrong choice is wrong, and its step-by-step solution. Then practise the lesson with new questions.
Your answers and results are kept in this browser only, so you can close the page and come back.
1 Question 1
Solve by substitution: 2x + y = 7, x − 2y = 6Type the answer.
2 Question 2
Solve by substitution: x + 3y = 10, 4x + y = 18Type the answer.
3 Question 3
Solve by substitution: 2x + y = 1, 3x + 2y = 4- A) (x, y) = (−2, 5)
- B) (−3, 7)
- C) (x, y) = (5, −2)
4 Question 4
Solve by substitution: 5x + y = 9, 2x − 3y = 7Type the answer.
5 Question 5
Solve by substitution: x − 2y = −2, 3x + 2y = 34Type the answer.
6 Question 6
Solve by substitution: 2x − y = 3, x + 3y = 12Type the answer.
7 Question 7
Solve by substitution: x + 4y = 3, 2x − 3y = −16Type the answer.
8 Question 8
Solve by substitution: x − y = 2, 3x + 2y = 21Type the answer.
9 Question 9
Solve by substitution: a + 2b = 7, 3a − b = 7- A) (a, b) = (3, 2)
- B) (7, 0)
- C) (a, b) = (2, 3)
10 Question 10
Solve by substitution: x + y = 3, 2x − 5y = −1Type the answer.