Find the value of (x + y), if 3x + 4y = 11 ; 4x + 3y = 10
Answers
Answered by
0
Answer:
Step-by-step explanation:
Given equations: 3x+4y=11 --[1]
4x+3y=10 --[2]
multiplying equation [1] with 3 and equation [2] with 4 we get
9x+12y=33 --[3]
16x+12y=40 --[4]
subtract, [4] - [3]
7x= 7 ⇒ x=1
y= (11-3x)/4 ⇒ y=2
therefore, (x+y) = 1+2 = 3
Similar questions