Addition/Subtraction
Solve for y.
y+9=32
y=23
Solve for n.
5n=45
n=9
Solve for a, then show you've checked your work.
3a + 4 = 16
a=4
Isaac received $125 for his birthday. He spent $65 on a new video game. How much money, x , does Isaac have left?
125 - 65 = x
x=$60
A symbol (usually a letter) that represents an unknown quantity.
What is a variable?
Solve for x.
98=71+x
x=27
Solve for w, then show you've checked your work.
24=6W
w=4
Solve for d.
5d -11 = 24
d=7
Charlotte brought 16 new pencils to school. She gave p pencils to a friend. Now she has 12 pencils left. How many pencils did she give away?
16 - p = 12
p= 4 pencils
The number in front of the variable.
What is the coefficient?
Solve for a.
a-32.79=6.4
a=39.19
Solve for v.
v/15=5
v=75
Solve for x.
x/4-3=2
x=20
270 students went on a field trip. 6 buses were each filled with s students. How many students were on each bus?
6s = 270
s=45 students
A mathematical sentence that shows that two expressions are equal.
What is an equation?
Solve for n, then show you've checked your work.
n-39.9 =21.7
n=61.6
Solve for k, then show you've checked your work.
1.9k=34.2
k=18
Solve for x, then show you've checked your work.
5x+2X-9=40
x=7
Aliyah is saving her allowance to buy a new bike. She earns $14 per week and the bike costs $98. How many weeks, w, will she need to save to buy the bike?
14w = 98
w=7 weeks
A value that does not change.
What is a constant?
Solve for x.
8.323+x=42.9
x=34.577
Solve for J.
J/10.6=8.7
J=92.22
Solve for y.
52-y+2y=62
y=10
Gary bought n notebooks for $3 each. He then used a $6 coupon when he checked out. If he spent a total of $15, how many notebooks did he buy?
3n-6=15
n= 7 notebooks
Operations that undo each other; addition and subtraction / multiplication and division
What are inverse operations?