$\underline{+\left\{\begin{array}{ccc}x+2y=7\\x-2y=-1\end{array}\right}\qquad\text{add both sides of the equations}\\\\.\qquad\qquad2x=6\qquad\text{divide both sides by 2}\\.\qquad\qquad \boxed{x=3}\\\\\text{Put the value of x to the first equation}\\\\3+2y=7\qquad\text{subtract 3 from both sides}\\\\2y=4\qquad\text{divide both sides by 2}\\\\\boxed{y=2}\\\\Answer:\ \boxed{x=3\ and\ y=2\to(3,\ 2)}$

7 0

2 years ago

What is x/2+4=10 I really need to know the steps

Gennadij [26K]

Answer:

Step-by-step explanation:

x/2+4=10

-4 -4

________

x/2=6

(2/1)*(x/2)=(2/1)*(6)

________

x=12

3 0

3 years ago

Given the function f(x) = -x + 4, then what is f(-3x) as a simplified<br> polynomial?

quester [9]

Answer:

3x+4

Step-by-step explanation:

f(x) = - x+4

Substitute in x=-3x

f(-3x)= - (-3x) + 4 = 3x+4

5 0

3 years ago