This is only one equation. It is therefore not a system and you can not solve for two different variables y and z unless you have another equation to solve with. It.
Step-by-step explanation:
180= 90+30+20x 90+30=120 180-120= 60
20x=60 x=3
Answer:
B
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Here m = - 2 and c = - 2 , then
y = - 2x - 2 ← is the equation of the line
To find the x- intercept let y = 0 in the equation and solve for x , that is
- 2x - 2 = 0 ( add 2 to both sides )
- 2x = 2 ( divide both sides by - 2 )
x = - 1
The x- intercept is - 1 → B
