Question

If x=1 and y=1 is the solution of a pair of linear equations ax +3y=7 and x +by =4 then the value of a+b = _______(-8 , 0 , 4 ,7 )

Answer 1

Answer:

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Step-by-step explanation:

Answer 2

Answer:

7

Step-by-step explanation:

ax+3y

a*1+3*1=7

a+3=7

a=7-3

a=4

x+by=4

1+b*1=4

1+b=4

b=4-1

b=3

a+b=? (a=4,b=3)

4+3

=7

therefore, a+b=7