solve by substitution method
4x- 5y = 20
3x+ 5y = 15
please koi help kar doo
Answers
Answered by
1
Step-by-step explanation:
1> x - y = 20
-------------
5 x 4
x - y = 0
x = y
2> x + y = 15
----------
3 x 5
x + y = 0
x = - y
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