Question

16. a) Stiind ca x+y+z+11=43, determinati valoarea lui x+y+z.
b) Daca 3×x+4×y+5×z+27=59, determinati 5×z+3×x+4×y.
c) Stiind ca x-2×y+13=52, determinati 3×x-6×y+1

Answer 1

16. a) x+y+z+11=43 |-11
x+y+z=32

b)3x+4y+5z+27=59 |-27
3x+4y+5z=32

c)x-2y+13=52 |-13
x-2y=39 |×3
3x-6y= 117