Question

stiind ca x=5 si y+z=14 calculati x+2y+2z

Answer 1

x+2(y+z)=5+2x14=33.........................


sau:

y+z=14 I x2

2(y+z)=28 si stim ca x=5, adunam  cele doua relati:
x+2(y+z)=5+2x14=33

Answer 2

 paiiiii./......................
  x+2(y+z)=5+2×14=5+28=33