-6
y = 5x + 3When x=2,y = 5(2) + 3 = 10 + 3 = 13
y = 100 - 4x ( a ) Find the value of y when x = 20.
Solve this simultaneous equation using the elimination method after rearraging these equations in the form of: 3x-y = 5 -x+y = 3 Add both equations together: 2x = 8 => x = 4 Substitute the value of x into the original equations to find the value of y: So: x = 4 and y = 7
(3, -3)
if 2x + y = 7, what is the value of y when x = 3?
It will be 16.
11
y = x - 3 is a linear function where for each x-value we find one and only one y-value.
Let one of the numbers be x and other be y. According to question: xy = -3 Put any value of x then value of y = -3/x. Let us say x = 1 then y = -3/1 = -3. And if x = 3 then y = -3/3 = -1. So for any value of x(except 0) we get a value of y. So there are infinitely many solutions of the given equation.
0
Then y = 3x.
y = 2x+5 x+y = 4 Substitute the value of y into the second equation: x+2x+5 = 4 x+2x = 4-5 3x = -1 Divide both sides by 3 to find the value of x: x = -1/3 Substitute the value of x into the original equations to find the value of y: x = -1/3 and y = 4 and 1/3
8x = 6y (8/6)x = y (4/3)x = y Let x = 3, 6, and 9, then y = 4, 8, and 12. So that for any value of x, you will find a correspoinding value for y.
3
x is 0.8
You are basically looking for an equation with an x and y value where when 4 is set as x, y would equal 7. An equation of this is: 3 + x = y when x = 4, then y = 3 + 4 = 7