I know this is a basic equation but I'm very rusty on algebra can someone help me with this?
Stacey Warren - Expert brainly.com
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step one, we must isolate x,
we do this by adding 102, (which is the opposite of addition) to both sides.
5x-102 = 13 + 102
5x = 115
divide both sides by 5
x = 23
first, add 102 both side
then divide both side by 5 to gt the x by itself and there is the answer
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And that works for most basic equations in algebra?
@tatumlee the idea behind these equations is that you must always isolate x, and whatever operation you do to one side, you must do to the other
@tatumlee if I gave you say
kind of similar to what you had before
2x+8 = 20
how would you solve it?
I would add 20 to both sides?
@tatumlee we need to get x BY itself FIRST
So we would subtract 8 from both sides
How do you know what parts to add to both sides or subject or something
yeah that's a good question, you look at what you have in the equation
subtract 8 both side and you'll get
divide both side by 2
when you look at the equation 2x+8=20, you want to get the 2x by itself in one side, so the only way you can do that is to subtract 8 to cancel out the 8's or make it zero.
You see that positive8 - 8=0. The rule is that if you subtract 8 one side, you MUST do the same to the other side of the equation too.
If the 8 was a negative (-8) , you would add 8 to make them zero.
hope you understand it