how do u solve x+3=0? its very confusing.

Answer 1

Subtract 3 from both sides of the equation.

x + 3 = 0
x = -3

You can see how this works on this number line.

http://mrjacobmath.googlepages.com/number-line.png

Answer 2

-3 + 3 = 0

x = -3

All you have to say is what minus 3 will give me 0

Answer 3

what if i wanted to graph the equation?

how would i do that?

Answer 4

x = -3, y = anything at all
so
vertical line through (-3,0)

Answer 5

thanks damon, chopsticks and ms. sue. you helped me alot!