Concepts
What is a variable?
An unknown quantity represented by a letter, such as x
Solve for x!
19-x=7
x=12
Solve for x!
x+17=73
x=56
10x+3x
13x
What is a term of x?
A quantity of x: x (1 x), 2x (2 x's), 3x (3 x's), and so on
7x=98
x=14
3x=93
x=31
18x-7x
11x
What are like terms? Give two examples!
Like terms are terms you can combine and simplify, for example, terms of x are like terms with other terms of x and numbers are like terms with other numbers.
Ex: 2x and 3x
6 and 11
2x+5=17
x=6
9x+4=76
x=8
2x+2+5x
7x+2
When solving a longer equation for x, do we separate like terms onto two sides first or combine them first?
Separate onto two sides first
5x-3=72
x=15
6x-3=51
x=9
3+9x-4x+19
5x+22
3x+20=7x
x=5
3x-25=8x
x=-5
13x+3-6x+4
7x+7