Question

Calculati a+b stiind ca:
a) a × c + b × c = 128 si c = -32
b) a × c + b × c = -96 si  c = -3
c) a × c + b × c = -882 si c = -9

Answer 1

a) c(a + b) = 128 si c = - 32
- 32 (a + b) = 128
a + b = 128/ - 32
a + b = - 4
b) c(a + b) = - 96 si c = - 3
-3 (a + b) = -96
a + b = - 96/ - 3 
a + b = 3
c) c (a + b) = - 882 si c = - 9
- 9 (a + b) = - 882
a + b = - 882/- 9
a + b = 98

Answer 2

a) a × c + b × c = 128 si c = -32
    c(a + b) = 128
    a + b = 128  / c
    a + b = 128 / (-32) = -4

b) a × c + b × c = -96 si  c = -3
    c(a + b) = - 96
     a + b = -96 / c
    a + b = -96 / (-3) = 32

c) a × c + b × c = -882 si c = -9
    c(a + b) = -882
    a + b = -882 / c 
    a + b = -882 / (-9) = 98