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5m - 3n = 19 ; …

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5m - 3n = 19 ; m - 6n = -7

Posted by Paras Jadhav 5 years ago

ICSE & ISC > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years ago

5m - 3n = 19 ......... (i)
m - 6n = -7 ........... (ii)
Multiple (i) by 2 , we get
10m - 6n = 38........... (iii)
Subtract (iii) and (ii), we get
(10m - 6n)- (m - 6n) = 38 - (-7)
10m - 6n - m + 6n = 38 + 7
9m = 45
m = 5
Put m = 5 in (ii) we get
5 - 6n = -7
-6n = -7 - 5
-6n = -12
n = 2

0Thank You

ANSWER

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ICSE & ISC > Class 10 > Mathematics