A solution to a system is when the lines cross, which means that the x and y co-ordinates must be equal. In other words, the equations must be equal.Originally Posted by beauty13
solve for x
Substitute the value of x into this equation
addition requires no paranthesis...
subtract 5 from both sides
When a solution comes out in the form of 0=0 than the two lines that were tested are the same line.
Can you do the other ones now or do you need more help?