7th Grade Expressions, Equations and Inequalities

Vocabulary

10

A symbol or letter to represent an unknown

variable

20

A term that does not contain any variable

constant

30

The number multiplying a variable

coefficient

Expressions

10

Write the mathematical expression for a variable w multiplied by 20

20w

20

Simplify:  5x - 12y - 7x +11y

-12x - y

30

If f = 2, j = 3 and g = 10, evaluate g - j x f

14

One Step Equations

10

7x=49

x=7

20

x-14= -9

x=5

30

x/6=12

x=72

Two Step Equations

10

x/3 + 5 = 10

x=15

20

-13 + 5x= 7

x=4

30

-7x - 11= 17

x=-4

Inequalities

10

x+9 < 16

x<7

20

8x ≥ 32

x ≥ 4

30

x/-6< -5

x>30