First you solve for y.
5x+ y= 12 so Y= 12-5x
And plug it into the next equation
3x- 3(12-5x) = 18
Distribute
3x-36+15x=18
Add 36 to both sides
3x+ 15x= 54
18x= 54 ... divide
x= 3
And you can plug in x to solve for Y
5(3) + y = 12
15+ y = 12 ...subtract 15 from both sides
y= -3
Domain and range of what? im not seeing a set of numbers id be happy to help tho
Area of rectangle is 
Step-by-step explanation:
Given,
Width of rectangle = m cm
As length is 5 times more than width;
Length of rectangle = 5m cm
Area of rectangle = Length x Width
Area of rectangle is
Keywords: Area, Multiplication, Rectangle.
Learn more about rectangles at:
#LearnwithBrainly
Isolate the K by subtracting 19 from both sides
(19-19)-k=(4-19)
-k=-15
Get rid of the negative by dividing
-k/-1=-15/-1
k=15
Hope I helped ❤
