Question

Daca a=7 si b+c=77, calculati: a)77·a+3·b+3·c b)88·a-7·b-7·c

Answer 1

Explicație pas cu pas:

77×7+3(b+c)=77×7+3×77=77(7+3)=770

88×7-7(b+c)=88×7-7×77=7(88-77)=7×11=77

Answer 2

a) 77 • a + 3•b+3•c=

=77•7 + 3 • (b+c)

= 539 + 3•77

= 539 +231

=770

b)88·a-7·b-7·c=

= 88 •7 - 7 • (b + c)

=616 - 7 • 77

=616 - 539

= 77

Sper ca te-am ajutat!!