Answer
$2.2x+1.2$
Work Step by Step
RECALL:
$\\\\$The distributive property:
$\\\\a(b+c)=ab+ac$.
$\\\\$Use this property to have:
$\\\\=7.8x-1.2 -1(5.6x) -1(-2.4)
\\\\=7.8x-1.2 -5.6x-(-2.4)
\\\\=7.8x-1.2 -5.6x+2.4
\\\\=7.8x-5.6x-1.2+2.4
\\\\=7.8x-5.6x+1.2$
$\\\\$Use the distributive property to have:
$=x(7.8-5.6)+1.2
\\\\=x(2.2)+1.2
\\\\=2.2x+1.2$
