Question

How do you solve `3.1(x+2)-1.5x=5.2(x-4)`?

Answer 1

`x = 7.5`

Explanation:

Treat the decimals the same as normal integers.

`3.1x+6.2 -1.5x = 5.2x-20.8 " "larr` multiply out brackets

`6.2 +20.8 = 5.2x -3.1x+1.5x" " larr` re-arrange terms

`27 = 3.6x`

`x = 27/3.6`

`x = 7.5`