Writing Equations
Solving Equations
Checking Solutions
Inverse Operations
100
The sum of a number, n, and 3 is 9.
n+3=9
100
Solve the equation. SHOW INVERSE OPERATIONS.
3.5=m-2.2
m=5.7
100
Is n=21 a solution to the equation?
3n=63
YES
63=63
100
What is the inverse of addition?
subtraction
200
A number, a, divided by 7 equals 14.
a/7=14
200
Solve the equation. SHOW INVERSE OPERATIONS.
12d = 60
d=5
200
Is w=18 the solution for the problem:
w/2=36
NO
9!=36
200
What is the inverse of division?
multiplication
300
Write an equation to solve for x.
176=16x
300
Solve the equation. SHOW INVERSE OPERATIONS.
31=6.2+y
y=24.8
300
Is z=128 the solution for the problem:
4z=32
NO
512!=32
300
What would I do to solve the equation?
a/7=14
Multiply both sides by 7.
400
You have been saving $12 a week for many weeks. One day, you decide to count your savings and find that you have $384. Write an equation to find how many weeks, w, you have been saving.
12x=384
400
Solve the equation. SHOW INVERSE OPERATIONS.
14=t/5
t=70
400
Is t=2/3 a solution for the problem:
3/4=t-1/2
NO
3/4=2/3-1/2
3/4=4/6=3/6
3/4!=7/6
400
What would I do to solve the equation?
9x=108
Divide both sides by 9.
500
Write and equation to solve for x:
28=1/2(8x) or 28=(8x)/2
500
Solve the equation. SHOW INVERSE OPERATIONS.
3/4=t-1/2
t=5/4 or t=1 1/4
500
Is x=42 a solution to the problem:
28=2/3x
YES
28=2/3(42)
28=84/3
28=28
500
What would I do to solve this equation?
3/4x=9
Multiply both sides by 4/3
OR
Divide by 3/4