Question

if 8x-7y=11 and 7x-8y=4 then what is the value of x+y​

Answer 1

Answer:

7

Step-by-step explanation:

x=(11+7y)/8

so

7((11+7y)/8)-8y=4

= 77/8 + 49y/8  -8y =4

=(49y-64y)/8=(32-77)/8

=15y=45

=y=3

then x = 11+21/8

         =32/8 = 4

so x+y = 4+3 =7

Answer 2

answer is 7

Step-by-step explanation:

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