Question

determinati numarul x stiind ca a-b=6:

b) x·a-x·b+9a-9b=654

c) 7·a-7·b+x=55

d) 13+x- (5·a-5·b) =2011

Answer 1

a) x(a-b)+9(a-b) = 654→ 6x+54 = 654 → 6x = 600 → x = 100

b) 7(a-b)+x = 55 → 63+x = 55 → x = 8

c)13x+5(a-b) = 2011 → x = 157