The sum of two numbers equals to the differece between the numbers plus 4.Find one of the numbers.

x+y=(x-y)+4 
2y=4
y=2

Solve: (x/a) - 2x = c

(x/a) - 2x = c 
x(1/a-2)=c 
x(1-2a)/a=c 
x=ca/(1-2a)

perform the indicated arithmetic -7 2/3 divided by 4 5/6

---

Please help me solve this question: If x^2 + y^2 = 29 and xy=2, find the value of i) x+y ii) x-y iii) x^4 - y^4

 
 
i) 

ii)similarly 
 
which leads to
 
iii)

image test

Solve by graphing: y = 3x y = -x+4

 

Solution: (1,3) 

:)

Describe the graph y=-1 and x=4

y=-1 is a horizontal line (parallel to the x-axis that passes through the intercept (0.-1) 

x=4 is a line parallel to the y-axis and passes through the point (4,0)