Solve the following pair of linear equation. 21x+47y=110 and 47x+21y=162
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21x+47y=110.....eq.1
47x+21y=162......eq.2
multiply the eq.1 by 47and eq.2 by 21
987x+2209y=5170
987x+441y=3402
- - -
0. +1768y=1768
y=1768/1768
y=1
put the value of y in eq. 1
21x+47(1)=110
21x=110-47=63
x=63/21
x=3
so, x=3 and y=1
47x+21y=162......eq.2
multiply the eq.1 by 47and eq.2 by 21
987x+2209y=5170
987x+441y=3402
- - -
0. +1768y=1768
y=1768/1768
y=1
put the value of y in eq. 1
21x+47(1)=110
21x=110-47=63
x=63/21
x=3
so, x=3 and y=1
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