Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

ICSE Class 9 Answered

7x-2y=20,11x+15y+23=0  
Asked by ruchikamalik0202 | 20 Sep, 2019, 10:45: AM
answered-by-expert Expert Answer
7x-2y=20          .... (1)
11x+15y = -23  .... (2)
Multiply equation (1) by 15 and (2) by 2, we get
105x - 30y = 300   ... (3)
22x  + 30y = -46   ... (4)
Adding (3) and (4), we get
127x = 254
→   x = 2
Substitute the value of x = 2 in (1), we get
7(2)-2y=20
→ 2y = -6
→   y = -3
 
Therefore x = 2 and y = -3.
Answered by Yasmeen Khan | 20 Sep, 2019, 11:37: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test Subjective Questions Webinar Subjective Questions Pre Board Assessment
Answered Unanswered My Questions My Answers
ICSE 9 - Maths
algebra question 15
question image
Asked by praveensaxena2009 | 28 May, 2022, 03:17: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
the some of the numerator and denominator of a fraction is 2 more than twice the numerator if the numerator and the denominator are reduced by 3 thay are in ratio 3:4 find the fraction
Asked by rrajsingh694 | 28 Jul, 2021, 01:56: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
2x-3Y-13=0;3X+5Y=16 stimulation method
Asked by kumarijanvi242004 | 28 Feb, 2021, 09:04: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
X+y=6 X-y=4 Find xy
Asked by Anandusree73 | 06 Jan, 2021, 04:17: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
1. 8x+5y=9   3x+2y=4    linear equation
Asked by kcbhuvan94 | 23 Sep, 2020, 03:35: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
3x + 4y =10 and 2x - 2y = 2
Asked by sannidhraj2004 | 16 Sep, 2020, 11:15: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
When a two digit number is divided by the sum of its digits, the quotient is 7. If the ten's digit is diminished by twice the unit's digit, the remainder is zero. What is the number?
Asked by hemanginivyas92.9spicertl | 28 Jul, 2020, 05:14: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
solve 4/X + 3/4=2 , 3/X - 2/4=5 by elimination method
Asked by deepvishal771 | 27 Jul, 2020, 11:26: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
How to solve By elimination method table attributes columnalign left end attributes row cell 6 x plus 5 y equals 5 end cell row cell 2 x minus 27 equals 11 y end cell end table
Asked by eshaanbayale51.9spicertl | 02 Jun, 2020, 01:46: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
How to solve 5x + 7y = 66                          2x - 3y = -20 By elimination method.  
Asked by eshaanbayale51.9spicertl | 02 Jun, 2020, 01:05: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt

Be a Top Scorer in the Exam with Test Series and Test Generator!

Enrol Now
×