Question

Solve the following equations and check your solution using substitution.

Answer 1

Answer:

$x=7$

Step-by-step explanation:

We can add the same quantity to both sides of the equations, and still have an equivalent equation. Let's add $x+2$ to both sides, then sum like terms

$5-x +x+2 = -2 +x+2\\5+2 = x\\7=x$

(this is the rule that allows us to move items from one side do the other of the equal sign by changing its sign)

At this point we have a solution, let's replace it to verify

$5-(7) = -2\\-2=-2$