it says if(x,-2) is a solution to the equation 5x-3y=11 what is the value of x?? i dont know wat to do my teacher didnt even explain thank you
2007-05-20 06:49:06 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
You have the y value. Solve for x. Plug in -2 for y
5x -3y = 11
5x -3(-2) = 11
5x +6 = 11
5x = 5
x=1
(1,-2)
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2007-05-20 06:54:09 · answer #1 · answered by Anonymous · 0⤊ 0⤋
(x, -2) represents one point (x,y) on the line represented by your equation, 5x - 3y = 11. To solve for x, plug in the given y value -2 in the equation and solve for the unknown.
5x - 3y = 11 becomes 5x - 3(-2) = 11
=> 5x+6 = 11 so 5x = 5 and x = 1.
2007-05-20 13:55:54 · answer #2 · answered by Number Power 3 · 0⤊ 0⤋
(x,-2) tells you that y= -2.
So plug -2 for y in the given equation and solve for x.
5x -3(-2) = 11
5x+6 = 11
5x = 5
x =1
2007-05-20 13:53:59 · answer #3 · answered by ironduke8159 7 · 0⤊ 0⤋
since you have the point (x,-2) you can plug it into the equation. so-> 5x-3(-2)=11
then solve for x
5x+6=11
5x=5
x=1
2007-05-20 13:52:22 · answer #4 · answered by lenkug 2 · 0⤊ 0⤋
(x, y) is a position on a coordinate plane. Here you are given y, so put in the -2 for the y and then solve for x.
2007-05-20 13:52:00 · answer #5 · answered by IMAO 2 · 0⤊ 0⤋