Question

se dau numerele: a=6x7-5x6-72:8
b=64:8+3x4-4x4
c=42:6-16:8
Calculeaza: 3xa=-2xb+c
urgent va dau coroana

Answer 1

a=6*7-5*6-72:8
a=42-30-9
a=3
b=64:8+3*4-4*4
b=8+12-16
b=4
c=42:6-16:8
c=7-2
c=5

Answer 2

3x*(6*7-5*6-72:8)=-2x(64:8+3*4-4*4)+42:6-16:8 3x*(42-30-9)=-2x*(8+12-16)+7-2 3x*(42-39)=-2x*(20-16)+5 3x*3=-2x*4+5 9x=-2x*9 9x+2x=9 11x=9 x=9-11 x=-2 (Sper ca e bun ! )