Question

I need the answers please

Answer 1

NUMBER 1
Subtitute y with x to find the value of x
y = -x + 2
x = -x + 2
x + x = 2
2x = 2
x = 2/2
x = 1

Subtitute x with 1 to find the value of y
y = x
y = 1

Solution
(x,y) = (1,1)


NUMBER 2
Subtitute y with x + 4 to find the value of x
y = 3x
x + 4 = 3x
x - 3x = -4
-2x = -4
x = -4/-2
x = 2

Subtitute x with 2 to find the value of y
y = 3x
y = 3(2)
y = 6

Solution
(x,y) = (2,6)


NUMBER 3
Subtitute x with y-5 to find the value of y
x = -2y + 1
y - 5 = -2y + 1
y + 2y = 1 + 5
3y = 6
y = 6/3
y = 2

Subtitute y with 2 to find the value of x
x = y - 5
x = 2 - 5
x = -3

Solution
(x,y) = (-3,2)


NUMBER 4
Subtitute x with y + 50 to find the value of y
x + 2y = 200
y + 50 + 2y = 200
3y = 200 - 50
3y = 150
y = 150/3
y = 50

Subtitute y with 50 to find the value of x
x = y + 50
x = 50 + 50
x = 100

Solution
(x,y) = (100,50)

Answer 2

Just answers?
1. y=1, x=1
2. y=6, x=2
3. y=2, x=-3
4. y=50, x=100