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

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Answer 1 · 2016-09-05T21:07:53

$x = 7.5$

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

$27 = 3.6x$

$x = 27/3.6$

$x = 7.5$

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