Question

3x+4y =7 , 4x + 3y= 5. x+ y? ​

Answer 1

Answer:

X= -1/7

Y=13/7

X+Y=12/7

Step-by-step explanation:

$3x + 4y = 7 \: eq(1) \\ 4x + 3y = 5 \: eq(2) \\ in \: equation(1) \: multiply \: by \: 4 \\ equation(2) \: multiply \: by(3) \\ y = 13 \div 7 \\ x = - 1 \div 7 \\ x + y = - 1 \div 7 + 13 \div 7 \\ = 12 \div 7$

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