Answer:
[tex]\boxed {x = 6}[/tex]
Step-by-step explanation:
Solve for the value of [tex]x[/tex]:
[tex]5.5 = 7.9 - 0.4x[/tex]
-Switch sides:
[tex]7.9 - 0.4x = 5.5[/tex]
-Subtract both sides by [tex]7.9[/tex]:
[tex]7.9 - 7.9 - 0.4x = 5.5 - 7.9[/tex]
[tex]-0.4x = -2.4[/tex]
-Divide both sides by [tex]-0.4[/tex]:
[tex]\frac{-0.4x}{-0.4} = \frac{-2.4}{-0.4}[/tex]
[tex]\boxed {x = 6}[/tex]
Therefore, the value of [tex]x[/tex] is [tex]6[/tex].
