how do I solve this equation?
how do I solve this equation?
Sophie:
Here we go: first always write out the equation. Always show all your work and you will make less mistakes.
3x - 4 + 4x = 24
Combine like variables and isolate any single numbers. Remember these equations are like a scale. What you do to one side, you do to the other. Always do the opposite of any operation on the left side and continue the same to the right, remember a scale or balance.
3x + 4x -4 = 24
7x -4 = 24
7x -4 + 4 = 24 + 4
7x = 28
Isolate X
7x/7 =28/7
x = 4
THe first thing you do is figure out the parts that can be combined. In this case you are able to add 3x and 4 x to get 7 x.
7x-4=24
Now you are able to isolate the "x" by adding 4 to each side : 7x-4+4=24+4
7x=28
The last part to figure out what x equals and to solve the equation is to divide both sides by 7:
7x/7=28/7
x=4