Remember you can do anything to an equation as long as you do it to both sides (except divide by 0)
add like terms
3x-x=3x-1x=2x
so
3x-x+2=12
2x+2=12
subtract 2 from both sides
2x=10
divide both sides by 2
x=5
Answer:
4 and 1/8, 4 and 2/12(or 1/6 simplified), 4 and 1/4, and 5 and 10/11
Step-by-step explanation:
4 and 1/8=412.5%
4 and 1/6=416 2/3%
4 and 1/4=425%
Step-by-step explanation:
In order to properly distribute, multiply the number on the outside of the parenthesis by the numbers on the inside.
Here is an example:
This simplifies to:
To evaluate an algebraic expression, you have to substitute a number for each variable and perform the arithmetic operations. In the example above, the variable x is equal to 6 since 6 + 6 = 12. If we know the value of our variables, we can replace the variables with their values and then evaluate the expression. Hope this helps! :)