Question

tìm x, biết:

x*1,5+x*2,5=20

Answer 1

x * 1,5 + x * 2,5

X x ( 1,5 + 2,5 ) = 20

X x 4 = 20

x = 20 : 4

x = 5
 

Answer 2

x.1.5 + x.2.5 = 20

-> x.(1.5 + 2.5)= 20
-> x.4 = 20
->x= 20:4=5

Vậy x= 5

Answer 3

\(x\cdot1,5+x\cdot2,5=20\)

\(x\cdot\left(1,5+2,5\right)=20\)

\(x\cdot4=20\)

\(x=20:4\)

\(x=5\)

vayx =5