Question

Se dau numerele a=6×7-5×6-72:8;b=64:8+3×4-4×4;c=42:6-16:8. Calculati: a) 3×a-2×b+c; b) 4×a-3×b+2×c.
Va rog frumos ajutatima.
Dau coroanaaaaa.

Answer 1

a=6x7-5x6-72:8
  =42-30-9
  =3
b=64:8+3×4-4×4
  =8+12-6
  =4
c=42:6-16:8
  =7-3
  =4
a)3x3-2x4+4=9-8+4=5
b)4x3-3x4+2x4=12-12+8=8