1.

Solve the equation x-2y=3 and 2x-y=9 by substitution method​

Answer»

Step-by-step EXPLANATION:

LET x-2y=3------------(i)

and 2x-y=9-----------(ii)

by substitution method

from (i)

x=3+2y

Now PUT x=3+2y in (ii)

2(3+2y)-y=9

6+4y-y=9

6+3y=9

3y=9-6

3y=3

y=3/3

y=1

put the value in (i)

x-2×1=3

x-2=3

x=3+2

x=5

y=1

x=5

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