Question

find the value of X and y in 2x+y=7,3x-y=0​

Answer 1

Answer:

2x+y=7

x=7-y/2 __________(i)

3x-y=0

x=y/3 ____________(ii)

From equation (i) and (ii)

7-y/2=x=y/3

=)7-y/2=y/3

=)7/2-y/2=y/3

=)7/2=y/3+y/2

=)7/2=2y+3y/6

=)7/2=5y/6

=)5y/6=7/2

=)y=7/2÷5/6

=)y=7/2×6/5

=)y=7×6/2/5

=)y=21/5=4.2

:.y=21/5

=)2x+y=7

=)2x=7-y

=)2x=7-21/5

=)2x=35-21/5

=)2x=14/5

=)x=14/5÷2

=)x=14/5×1/2

=)x=7/5

:.x=7/5

$x = \frac{7}{5} and \: y = \frac{21}{5}$

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