Question

find value of (X+y) if, 3x+4y=11 , 4x+3y=10
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Answer 1

Answer:

Step-by-step explanation:3*1+4*2=11

3*2+4*1=10

1=x and 2=y

Answer 2

Answer:

Sol

  3x+4y=11

  x=(11-4y)/3-------------1

4x+3y=10

substituting the value of x from eq1

4(11-4y)/3+3y=10

(44-16y)/3+3y=10

(44-16y+9y)/3=10

44-7y=30

44-30=7y

y=14/7

y=2

Again ,

sustituting the value of y in eq 1

x=(11-4*2)/3

x=1

∴x+y=1+2=3