Current location - Training Enrollment Network - Mathematics courses - Page 58 of six math exercises: solving equations: 1, 3x+2x = 7-3x-4y = 12, 7x+5y =12-6x-5x =14.
Page 58 of six math exercises: solving equations: 1, 3x+2x = 7-3x-4y = 12, 7x+5y =12-6x-5x =14.
1、3x+2y=7....( 1)

3x-4y= 1.....(2)

(1)-(2), 6y=6, y= 1.

Bring Y= 1 into (1) and get x=5/3.

2、x=2，y=-2/5

3、x-2y=7 6x-24y=30 x=9，y= 1

4、40x+ 15y =- 10 18x+ 15y =-2 1

x= 1/2 y=-2

Related articles
  • Primary school Chinese
  • What changes have taken place in the mathematics line over the years?
  • The concept of the earth
  • What book is better for junior high school Olympic Mathematics? Please recommend it. It'd better be more difficult. Thank you.
  • Understanding the lecture notes of parallelogram
  • Is √2 a mathematical constant?
  • Teaching plan of picture book "Little Hedgehog's Necklace" in kindergarten middle class
  • How to do a math problem
  • The problem of junior one mathematics scheme
  • Mathematics for Postgraduate Entrance Examination of Material Science and Engineering Specialty

    • copyright 2024 Training Enrollment Network All rights reserved