Vocabulary
This type of math problem has no equal sign.
Expression
4+b=7
b=3
6x-2x=24
x=6
p+7p+5p
13p
Is this an expression or equation?
2y+6x+12+4y-18y
Expression
This type of math problem has an equal sign.
Equation
-10+x=4
x=14
2x+5=21
x=8
6m+m+2+3m - 8
10m - 6
What makes an equation different than an expression?
It has an equal sign.
Another word for a number (without any letters beside it) in expressions and equations.
Constant
4x=20
x=5
-4 - 3b=11
b=-5
-6q+7-2+4q
-2q+5
Evaluate 3(x-10) for x = 17
21
Another word for a number (with any letters beside it) in expressions and equations.
Coefficient
x/-5 = 12
x=-60
2(3x+1)=14
x=2
10x+2(3y-4x)+2y
2x+8y
Write an expression to show:
divide the sum of g and 6 by 5
(g+6)/5
The letters in an expression or equation.
Variable
0.3r=2.1
r=7
-2(x+2x)=36
x=-6
Find the sum of the following expressions.
(3x + 4) - (2x - 1) - x - 5
0
Billy has a gift card with a $150 balance. He buys several video games that cost $35 each. After the purchases, his gift card balance is $45. WRITE an equation to help find out how many video games, v, Billy bought. You must also SOLVE.
150 - 35v = 45
v = 3