Question

How do I do this step by step... x - 31 - (1.3x - 31)

Answer 1

That just disappeared...

Answer 2

x - 31 - (1.3x - 31) distribute the negative
x - 31 - 1.3x + 31 rearrange with Commutative Property
x - 1.3x - 31 + 31 identity property
x - 1.3x + 0 add like terms
1x - 1.3x (or distribute/factor)
(1 - 1.3)x subtract
...

Answer 3

JUST SAYING!"1.3" was replaced by "13/10".

13x/10 - 31

31 = 31/10 = 31 • 10/10

13x - (31 • 10)/10 = 13x - 310/10

x - 31 - 13x-310/10

x - 31 = x - 31/1 = (x - 31) • 10/10

(x-31) • 10 - ((13x-310))/10 =-3x/10

-3x/10

Answer 4

Yeah I saw that too @wallenbaughz