ICSE Class 9 Answered
Q9. 13x + 11y = 70
11x + 13y = 74
Asked by Swatisasturkar | 04 Feb, 2023, 01:27: PM
Expert Answer
13 x + 11 y = 70 . . . . . . . . . . . . . . (1)
11 x + 13 y = 74 . . . . . . . . . . . . . . (2)
Multiply eqn.(1) by 11 , 143 x + 121 y = 770 . . . . . . . . . . . . . . . (3)
Multiply eqn.(2) by 13 , 143 x + 169 y = 962 . . . . . . . . . . . . . . .(4)
subbtracting eqn.(3) from eqn.(4) , we get
48 y = 192 or y = 4
by substituting y = 4 in eqn.(1) , we get 13 x = 70 -44 = 26
x = 2
Answer :- x =2 , y = 4
Answered by Thiyagarajan K | 04 Feb, 2023, 03:02: PM
ICSE 9 - Maths
Asked by Swatisasturkar | 04 Feb, 2023, 01:27: PM
ANSWERED BY EXPERTICSE 9 - Maths
Asked by aroragayatri2006 | 11 Sep, 2020, 11:25: AM
ANSWERED BY EXPERT