Writing Equations
The sum of 13 and 6x is equal to 15.
13 + 6x = 15
The sum of 5 and x is less than or equal to 20
5+x<=20
18 + x = 36
x = 18
x + 7 < 8
x < 1
2(x + 1) = 8
x = 3
Felicia and Sam sold 103 muffins at the bake sale. Felicia sold 25 muffins. How many muffins did Sam sell at the bake sale?
s + 25 = 103
Alani makes 12 dollars an hour for babysitting. How many hours does she need to babysit to make at least 50 dollars?
12x>=50
x - 45 = 88
x = 133
4x>=24
x>=6
5(x - 4) < 15
x < 7
Roger bought some used CDs at a garage sale. He gave 9 CDs to his dad and kept 12 of them for himself. How many CDs did Roger buy at the garage sale?
c - 9 = 12
Beauty is buying candy at the store. Each bag costs $1.25 She wants to spend less than 10 dollars. How many bags of candy can she buy?
1.25c<10
15x - 3 = 57
x = 4
x - 12 < -4
x < 8
-4(x + 12) = -40
x = -2
Alison took 51 candy bars and split them into groups to give out for Halloween. She put 3 bars in each group. How many bunches did Alison make?
51/3 = b
Ayden wants to spend at least $20 at the bake sale. He is going to buy one cake for $15 and some brownies for $1.50 each. How many brownies can he buy?
15+1.50b>=20
x/7 - 4 = 3
x = 49
-8x >= 32
x <= -4
9(2x - 6) > 36
x > 5
Francine bought a book for $18 and 3 magazines. She spent a total of $33
18 + 3m = 33
An arcade has a $16 entry fee and each game costs $1.75. Cristian wants to spend no more than $30 at the arcade. How many games can he play?
16+1.75g<=30
3x + 10 = 25
x = 5
9 < 2 + (-x)
-7 > x
-15(-x + 3.5) = -45
x = 0.5