How to write the test paper of mathematical equation of one variable and one degree

How to write the test paper of mathematical equation of one variable and one degree

The following equation is a quadratic equation of one variable, which is () a.b.c.d.2. Please check which of the following numbers is the solution of the equation ...

Four questions on solving linear equation of one variable
Please help me
2x-1 5x-1
1.-- - -- = 1
6 8
two
2.- (3x+7)=2-1.5x
seven
4 2 1 3
3.2[- x -(- x - -)]=-x
3 3 2 4

Please write the title clearly. I can't see it clearly

A comprehensive test of linear equation of one variable
1. In order to expand the market, the store adjusted the sales of a certain kind of camera and sold it at a 20% discount of the original price. At this time, the profit margin is 14%. If the purchase price of the camera is 1200 yuan, how much is the original price of the camera?
2. Grandfather and grandson play chess. Grandfather wins one game and grandson wins one game. The score is 1 point and grandson wins one game and the score is 3 points. After they play 12 games (no draw), the score is the same. How many games have they won?
3. Two T-shirts and two bottles of mineral water are sold for 44 yuan, one T-shirt and three bottles of mineral water are sold for 26 yuan, please ask the price of one T-shirt and one bottle of mineral water.
4. A certain mobile communication company has launched two kinds of communication services: "global communication". Users pay 18 yuan monthly rent first, and then pay 0.3 yuan for each minute of the call. "Shenzhoutong" does not pay the monthly rent, and pays 0.4 yuan for each minute of the call Using the same method, Mr. Wang estimates that his monthly call time is about 270 minutes. Then, which communication service does he choose to save money?
(Note: detailed steps should be listed for each of the above questions)

1.1200 * 0.76 / 0.8 = 1140 (yuan) 2. Let Sun Tzu win the X set. 3x = 12-x x = 3122-3 = 93.26 * 2-44 = 8 8 / 4 = 2 mineral water (44-4) / 2 = 204. Let's call for X minutes. 18 + 0.3x = 0.4x x = 180270 * 0.3 + 18 = 99270 * 0.4 = 108, so choose globalcom

(2010 · Beijing) we know the univariate linear equation x ^ 2-4x + M-1 = 0 about X, find the value of M and the root of the equation

You have a problem with this problem. If all the conditions are linear equations with one variable and x ^ 2 appears, I will give you the problem to change: it is known that the quadratic equation with one variable x ^ 2-4x + M-1 = 0 has two equal real roots. Find the value of M and the root of the equation? The answer will be m = 5. X = 2