Solving 1 step equations
x+12=25
x = 13
3x+8=17
x = 3
What is the inverse operation of the following:
+ 6
- 6
A number is doubled to get 18. What is the equation?
2d = 18
Solve: 2z − 9 = -1
2z - 9 = -1
2z = 8
z = 4
y−7=15
y = 22
2m−5=11
m = 8
What is the inverse operation of the following:
4e = 20
÷ 4
A number is multiplied by 4 and the answer is 28. What is the equation?
4y = 28
Solve: 3z - 7 = 20
3z - 7 = 20
3z = 27
z = 9
5m=30
m = 6
−6w−10=2
w = -2
What is the inverse operation of the following:
÷ 7
x 7
A number is doubled, then 9 is subtracted. The result is 15. What is the equation?
2f - 9 = 15
Solve: 4r + 3 = 31
4r + 3 = 31
4r = 28
r = 7
−4p=−24
p = 6
7p+0.5=14.5
p = 2
What are the steps you would use to undo the following equation:
5a - 4 = 26
+ 4
÷ 5
You and your friends are going to the movies.
You buy 4 movie tickets and a $2 bag of popcorn.
You spend $74.50 altogether. Let the cost of one movie ticket be represented by t.
Write an equation to represent the situation.
4t + 2 = 74.50
Solve: 3(h + 2)= 24
3h + 6 = 24
3h = 18
h = 6
4.4w=20
w = 4.55
4y+1=6
y = 1.25
Explain why you must do the same to both sides of an equation.
You must always keep both sides of the equation balanced. The equals sign means that both sides are the same. If you change one side and not the other the equation is not balanced.
You and your friends order pizza for a movie night.
You pay a $5 delivery fee and pizzas cost $12 for each.
You spend $53 altogether. Let the number of pizzas be represented by p.
Write an equation and solve it to find how many pizzas you ordered.
12p + 5 = 53
12p = 48
p = 4
Which inverse operation should you use for this equation ( 3x=15 ) ?
Division