If {x = 1 / 2, y = 1, is the solution of the equation {mx-3y = 5 2x - NY = 1, find the value of Mn

If {x = 1 / 2, y = 1, is the solution of the equation {mx-3y = 5 2x - NY = 1, find the value of Mn

mx-3y=5 ①
2x-ny=1 ②
X = 1 / / 2 y = 1 into 2: 2 × 1 / 2-N = 1
N=0
X = 1 / / 2 y = 1 substituting ①: 1 / 2m-3 = 5
m=16
mn=16×0=0
The value of Mn is 0

It is known that the system of bivariate linear equations MX + 3Y = m, Y-X = 2 We know the system of bivariate linear equations about x.y mx+3y=m, y-x=2 The solution of M satisfies 2x-1 = 3ym

9m ^ 2-m + 15 = 0, so m has no solution

If the solutions of the equations 4x + 3Y = 22, (1) and MX + (M-3) y = 3, (2) satisfy x = 2Y, find the value of M If the solutions of the equations 4x + 3Y = 22, (1) and MX + (M-3) y = 3, (2) satisfy x = 2Y, find the value of M

simultaneous equation:
4x+3y=22,(1)
x=2y (2)
(2) Bring in (1)
Y=2
Furthermore, x = 4
X = 4, y = 2 are introduced into MX + (M-3) y = 3:3
4m+2(m-3)=3
6m=9
m=3/2

If the sum of X and Y in the solution of the system of equations 4x + 3Y = 1 MX + (1-m) y = 3 is 1, then the value of M is () A、-1 B、0 C、1 D、2

B
If you want the process, please tell me

It is known that in the solution of the equations 4x + 3Y = 1,2mx + (m-1) y = 3, X and y are opposite numbers to each other, so it is very urgent to find the value of M!

The implied condition of this question is: X and y are opposite numbers to each other
Substituting 4x + 3Y = 1, we get x = 1, y = - 1;
Then substituting 2mx + (m-1) y = 3 to get 2m * 1 + (m-1) * - 1) = 3 to get m = 2

(1) Xiao Ming has read 98 pages of a book for seven days, but he has not finished reading it. However, Xiaojun has finished reading it in less than a week. On average, Xiaojun reads three more pages a day than Xiaoming. How many pages does Xiao Ming read every day? (2) If 4x + 3Y = 1 ax + (A-1) y = 3, the solution x is equal to the value of Y, and a is equal to?

1. If Xiao Ming reads x pages a day on average, Xiaojun reads (x + 3) pages a day on average
7x98
The answer is 11

Equations 4x+3y＝1 If the value of X and Y in the solution of (K − 1) x + KY = 3 is equal, then K=______ .

According to the meaning of the title, x = y,
The simultaneous equations can obtain x = y = 1
7，
（2k-1）×1
7=3，
K = 11
So the answer is: 11

If mx-3y = 9,2x-y = 1. There is no solution, then the value of M is (⊙ o ⊙) oh

Six

If there is no solution for the system of quadratic equations of two variables: ① mx-3y = 9, ② 2x-y = 1, then the value of M is (Note:

①-②*3
(m-6)x=6
x=6/(m-6)
When M-6 = 0, there is no solution

2x-3y-2 = 0, one seventh (2x-3y + 5) + 2Y = 9 to solve the system of bivariate first-order equations

2x-3y-2=0………… (1)
1/7*(2x-3y+5)+2y=9………… II.
From (1) to (2)
2x-3y=2………… 3.
By substituting into (2), we can get:
1/7*(2+5)+2y=9
1+2y=9
2y=8
Y=4
3
2x-3*4=2
2x-12=2
2x=14
X=7