Question

[ghast boy]

X x 1 + X x 2 + X x 3 = 900-420

Answer 1

[Huỳnh Quang Sang]

\(x\cdot1+x\cdot2+x\cdot3=900-420\)

\(x\cdot(1+2+3)=480\)

\(x\cdot6=480\rightarrow x=80\)

Answer 2

[๖ۣۜFunny-Ngốkツ]

X x 1 + X x 2 + X x 3 = 900 - 420

X x ( 1 + 2 + 3 ) = 480

X x 6 = 480

X = 480 : 6

X = 80