1) -5/7 x=25 best answer -12, -35
2) x-1/5 =3/5 best answer -3 or 4/5
Not sure any help is appreciated
2006-08-31 08:25:57 · 11 answers · asked by bsmooth 1 in Science & Mathematics ➔ Mathematics
the first answer is -35
the second answer is 4/5
here's why:
multiply both sides by 7
-5x = 175
two negatives together = positive
x= -35
multiply both equations by 5
x-1 =3
x=4
so x=4/5
2006-08-31 08:31:38 · answer #1 · answered by Scott B 3 · 0⤊ 0⤋
In general for questions like this, you try to get x to be on one side of the equation and everything else on the other side.
To keep the equation from being changed you have to do exactly the same thing on each side of the equation, but you never can multiply by zero or divide by zero.
Be cautious when dividing by x, try to avoid it, since you don't know what x is it might be zero.
Problem 1)
-5/7 * X = 25 (the symbol * is used for times)
multiply on both sides of the equation by -7/5, note that when you multiply a negative number by a negative number a positive results.
(-7/5)*(-5/7)*X = (-7/5)*25
1*X =-7*5
x = -35
Problem 2)
x - 1/5 = 3/5 (add 1/5 to both sides of the equation)
x = 4/5
2006-08-31 15:39:52 · answer #2 · answered by Anonymous · 0⤊ 0⤋
For those questions, if you've got the answers, just plug in the two answers and see which makes the numbers work!
-5/7 X 35 = 25
or does -5/7 x -12 = 25?
Can answer the question that way, faster than you can type it in!
:-)
2006-08-31 17:02:41 · answer #3 · answered by Yada Yada Yada 7 · 1⤊ 0⤋
-35 and 4/5
-5/7x = 25
divide both sides by x
-5/7 = 25/x
-5/7=25/-35
x-1/5=3/5
add 1/5 to each side
x=4/5
2006-08-31 15:35:36 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Obviously -35 & 4/5 Why on earth will a linear have 2 roots? where is the question of best answer? Thats the only answer
2006-08-31 15:32:27 · answer #5 · answered by Love to help 2 · 0⤊ 0⤋
1) x=25*7/(-5)= -35
2) x=3/5+1/5= 4/5
2006-08-31 15:35:19 · answer #6 · answered by Anonymous · 0⤊ 0⤋
The answer for question 1 is -35
-5/7x=25
-5x=7.25
x=175/-5
x=-35
The answe for question 2 is 4/5
x-1/5=3/5
x=1/5+3/5
x=4/5
2006-08-31 15:36:04 · answer #7 · answered by tabularasa73 2 · 0⤊ 0⤋
1). Multiply both sides by -7/5 to get x alone.
Answer: -35.
2). Add 1/5 to both sides. Answer: x = 4/5
2006-08-31 15:36:10 · answer #8 · answered by steiner1745 7 · 1⤊ 0⤋
I would answer the question in the following way:
-5/7x=25
-5x=25X7
-5x=175
x=-35
x-1/5=3/5
x=3/5+1/5
x=4/5
2006-08-31 15:47:18 · answer #9 · answered by exxavier 2 · 0⤊ 1⤋
1) x= 25*(-7/5)
Or, x = - 25*(7/5)
Or, x =-(25/5)*7
Or, x = -5*7
Or, x = -35
2) x- 1/5 = 3/5
Or, x = 1/5+3/5
Or, x = 4/5
2006-08-31 15:35:36 · answer #10 · answered by K Sengupta 4 · 0⤊ 0⤋