Question

for the equation if
$7x + 8y = 25 and 8x + 7y = 35 then x + y =$
​

Answer 1

Step-by-step explanation:

Geometric figure: Straight Line

Slope = -2.286/2.000 = -1.143

x-intercept = 35/8 = 4.37500

y-intercept = 35/7 = 5

Answer 2

Answer:

Option D)4

Step-by-step explanation:

Assign 7x+8y=25 as equation 1, and 8x+7y=35 as equation 2

Add both the equations

7x+8y=25

+8x+7y=35

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15x+15y=60

Take 15 common in L.H.S,

15(x+y)=60

Divide both sides by 15.

Therefore, x+y=4

Hope it helps