3)If 5x – 3y = 9 and 3x - 5y =7 then find(x-y)

1.	3)If 5x – 3y = 9 and 3x - 5y =7 then find(x-y)
Answer» Answer: If 5x+3y=9 & 3x+5y=7, what is the value of X+y? Choose the right partner in your home building journey. Jack Johnson Answered 2 YEARS ago 3x+5y=7 Therefore: 3x+5y+2=9 Because both equations now EQUAL 9, we can set them equal to each other. 5x+3y=3x+5y+2 simplify to get 2x-2y=2 2x=2y+2 x=y+1 Now SUBSTITUTE y+1 for x in one of the original equations. 5(y+1)+3y=9 5y+5+3y=9 8y+5=9 8y=4 y=0.5 Now plug 0.5 in for y and solve for x 3x+5(0.5)=7 3x+2.5=7 3x=4.5 x=1.5 Now simply add x and y TOGETHER to get your answer. 1.5+0.5= 2 x+y= 2

Answer»

Answer:

If 5x+3y=9 & 3x+5y=7, what is the value of X+y?

Choose the right partner in your home building journey.

Jack Johnson

Answered 2 YEARS ago

3x+5y=7

Therefore: 3x+5y+2=9

Because both equations now EQUAL 9, we can set them equal to each other.

5x+3y=3x+5y+2

simplify to get 2x-2y=2

2x=2y+2

x=y+1

Now SUBSTITUTE y+1 for x in one of the original equations.

5(y+1)+3y=9

5y+5+3y=9

8y+5=9

8y=4

y=0.5

Now plug 0.5 in for y and solve for x

3x+5(0.5)=7

3x+2.5=7

3x=4.5

x=1.5

Now simply add x and y TOGETHER to get your answer.

1.5+0.5= 2

x+y= 2

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