HELLP

an example could be - 5x - 3

Step-by-step explanation:

4x - 2

Step-by-step explanation:

Write an algebraic expression.

An algebraic expression is an equation that consists of one or more variables within.

Variables are letters that have an unknown value and can be substituted :

With this information :

3x - 5

5x - 9

3x + 45

are all examples of alebraic expressions.

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18