Question

tìm x:5x+2016=2006

2(x-4)-(x+5)=-13

Answer 1

5x+2016 = 2006 => 5x = 2006 - 2016 = -10 => x = -10 : 5 = -2

2(x-4)-(x+5) = 2x-8-x-5 = (2x-x)-(8+5) = x-13 = -13 => x = -13+13 = 0

Answer 2

\(5x+2016=2006\)

\(\Rightarrow5x=2006-2016\)

\(\Rightarrow5x=-10\)

\(\Rightarrow x=-10:5\)

\(\Rightarrow x=-2\) 

 

\(2\left(x-4\right)-\left(x+5\right)=-13\)

\(\Rightarrow2x-8-x-5=-13\)

\(\Rightarrow x=-13+8+5\)

\(\Rightarrow x=0\)