Question

Tìm x biết: (x+5) + (x+10) + (x+15) + (x+20)=74

Answer 1

(x+5)+(x+10)+(x+15)+(x+20)=74

=>(x+x+x+x)+(5+10+15+20)=74

=>4x+50=74

=>4x=74-50

=>4x=24

=>x=24:4

=>x=6

Answer 2

\(\left(x+5\right)+\left(x+10\right)+\left(x+15\right)+\left(x+20\right)=74\)

\(\Rightarrow4x+50=74\)

\(\Rightarrow4x=24\)

\(\Rightarrow x=6\)