Solving Equations
Substitution
Combining Like Terms
Writing Expressions
Vocabulary
100
Solve this equation: x + (-4) = 6
x = 10
100
Evaluate 3x + y if x is 4 and y is 5
17
100
Combine Like terms: 2x + 3y + 5x + 9 + 2y + 7
7x + 5y + 16
100
Write the expression: the product of a number and 7.
7x or x•7
100
What is a variable?
A letter or symbol in place of a number in an equation or expression.
200
Solve this equation: x - (-5) = (-12)
x = (-17)
200
Evaluate xy + z if x is (-2), y is 5, and z is 7.
-3
200
Combine Like Terms: 3x + 4y + 10 - 2x - 9y - 3
1x + (-5y) + 7
200
Write the expression: a number decreased by 9
x - 9
200
What is absolute value?
The distance from zero.
300
Solve this equation: x/6 = 9
x = 54
300
Evaluate 4x - y + z if x = (-2), y = 4, and z = (-1).
-13
300
Combine Like Terms: (-3x) + 10 + 2x + (-9) + 3y - 3y + (-5x)
(-6x) + 1
300
Write the expression: the quotient of -7 and a number
-7 ÷ n
300
What is an integer?
A positive or negative whole number.
400
Solve this equation: 3x + 5 = 20
x=5
400
(xˆ2 - y) /2x + z if x = 3, y = (-2), and z = (-1)
11/5 or 2 and 1/5
400
Combine Like Terms: 3(x + y) - 4x + 8 + (-6y)
-x -3y + 8
400
Write the expression: the product of a number and the sum of seven and 2y
x(7+2y)
400
What does the distributive property tell us to do?
Multiply what is on the outside times each term on the inside of the parenthesis.
500
Solve this equation: x/3 - 5 = (-9)
x = (-12)
500
(xˆ2 - (-2y) / 3z when x = (-2), y = 3, and z = (-1)
-10/3 or -3 and 1/3
500
Combine Like Terms: -2(x - y) + 3(-2 + y) - 4x + 9
-6x + 5y + 3
500
Write the expression: the product of three and the difference of a number and 8
3(x-8)
500
What does the commutative property tell us?
Order doesn't matter in addition or subtraction! a + b = b + a or a•b = b•a
M
e
n
u