use algebra to solve each equation

Question

a) 4x=-16

b) 12=-3x

c) -21=7x

Answer 1

When solving for an equation, we usually want to find the value of the variable.  The variable in all these equations is x.

 

 

a)

 

Divide both sides of equation by 4.

 

x = -4

 

 

b)

 

Divide both sides of equation by -3.

 

-4 = x

 

 

c)

 

Divide both sides of equation by 7.

 

-3 = x