Solve by CROSS MULTIPLICATION:
ax + by = c
bx + ay = 1+c
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ax+by=c
bx+ay =1+c
x(a+b) + y ( b+ a) = 2c+1
(x+y )( a+b ) = 2c+1
x+y = (2c+1)/( a+ b )
hope helped !
bx+ay =1+c
x(a+b) + y ( b+ a) = 2c+1
(x+y )( a+b ) = 2c+1
x+y = (2c+1)/( a+ b )
hope helped !
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