expressions and equations

Question

i
Solve the following equation for x:

 

0.4(2x + 1/2) = 3[0.2x + (-2)] -4

Answer 1

this is a linear equation in only one variable; to solve it, first distribute the constant that is in front of the expressions, then collect LIKE terms.

 

Once you get a numerical answer, CHECK its correctness by substituting -- the value on the left side of the = sign should equal the value on the right side.l