Vocabulary
A value that doesn't change
Constant
Find x:
3x = 9
x = 3
True or False
11x - 4 = 7
x = 2
A: False
x = 1
How many solutions does this equation have?
3x = 4 + 3x
no solution / one solution / infinitely many solutions
no solution
A farmer has some chickens on his farm. If he buys 12 more chickens, he will have 30 chickens in total. How many chickens does the farmer have now?
Answer: 18
A number multiplied by variables
Coefficient
Solve and find y :
6y - 7 = 4y + 5
y = 6
True or False
4n + 56 = -4n + 8
This equation has no solution
A: False
This equation has one solution
How many solutions does this equation have?
-20n x 2 = 2(-20n + 7 - 7)
no solution / one solution / infinitely many solutions
infinitely many solutions
Jonah runs his own bakery. This morning, Jonah baked 42 peach pies. He also baked some more after lunch. In total, he baked 64 peach pies.
How many peach pies did Jonah bake after lunch?
Equation: 42 + N = 64
N = 22
Jonah baked 22 peach pies after lunch.
A single expression
Term
Solve and find x :
3x + 14 = - 4x - 7
x = - 3
True or False
-1.82 + 3p = 1.18
p = 1
A: True
How many solutions does this equation have?
3y = 99 + 9
infinitely many solutions / one solution / no solution
One solution
Tina went to Chicago for her vacation. She had $560 at total. When she came back from Chicago, she has $27 left. How much money did Tina spent on her vacation?
$533
What is the definition of Variables
A letter or term that represents an unknown number(x,y)
Solve and find n :
4n x 2 = 42 + 14
n = 7
True or False
Ax2 - 45 - 53 = 3x2 - 98
if this equation has infinitely many solutions, what is A?
A = 3
How many solutions does this equation have?
7(n+6) = 5n + 2n
no solution / one solution / infinitely many solutions
no solution
answer: x + 3x = 64
x = 16
What is the definition of Operator
Multiplication, addition, subtraction or division
Solve and find c :
3x2 + 14c - 13 = 11c + 3x2 +2
c = 5
True or False
A movie theater has 120 seats. After selling tickets for a group of 75 people, there are still x empty seats.
x is 45
How many solutions does this equation?
14(3n + 5) = 6 x 7n + 25 + 45
no solution / one solution / infinitely many solutions
infinitely many solutions
A store is selling pencil for $2 each and eraser for 1$ each. Maria spends 20$ and buys twice as many pencil as erasers. How many erasers did she buy?
Answer: 4