Simultaneous (Linear) Equations [Including Problems] | ICSE Mathematics Class 9 | Ex 6B | Part V
ICSE
Selina
Concise Mathematics Class 9
Chapter 6. Simultaneous (Linear) Equations [Including Problems]
Exercise 6 (B) Method of elimination by equating coefficients
Part 5- Questions 13, 14, 15 & 16.
For solving each pair of equations, in this exercise, use the method of elimination by equating coefficients.
Q13. Solve for x & y :
1) (y+7)/5 = (2y – x)/4 + 3x - 5
(7-5x)/2 + (3-4y)/6 = 5y – 18
Q14. Find the value of m, if x = 2, y = 1 is a solution of the equation 2x + 3y = m
Q15. 10% of x + 20% of y = 24
3x – y = 20
Q16. The value of expression mx - ny is 3 when x = 5 and y = 6. And the value is 8 when x = 6 and y = 5. Find the values of m & n.
Below are the video links for chapters.
Exercise 3 (C) Part I
• Compound Interest (Using Formula) | ICSE M...
Exercise 3 (C) Part II
• Compound Interest (Using Formula) | ICSE M...
Exercise 3 (C) Part III
• Compound Interest (Using Formula) | ICSE M...
Other exercises in this chapter • Compound Interest using Formula | Class 9 ...
For March 2021 examination of class 9
Standard IX Revised syllabus. 2020-21
For March 2021 examination of class IX