Respuesta :

SvetlanaM
x + y + z = 855   or   y + z = 855 - x
x = 1.5(y + z)

substituting for (y+z) in  the  2nd equation
x = 1.5(855 - x)
x = 1282.5 - 1.5x
x + 1.5x = 1282.5
2.5x = 1282.5
x = 1282.5 ÷ 2.5
x = 513.
Answer: 513. 

Answer:

x  = 513

Step-by-step explanation:

let us assume three numbers be  x, y, z

given,

x = 150 % of ( y + z )

x = 1.5( y + z )...............................(1)

x + y + z = 855

from equation (1)

1.5( y + z ) + y + z = 855

2.5 y + 2.5 z = 855

2.5 ( y + z ) = 855

 y + z =  342...................................(2)

putting value of equation 2 in equation 1

    x  = 1.5 × 342

    x  = 513

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