Question

DAU COROANA
VA ROOOG URGENT!! Ajutatima si pe mine la exercitiile urmatoare:
1) x*a-x*b+9*a-9*b=654
2) 7*a-7*b+x=55
3) 13+x-(5*a-5*b)=201
*=ori
stiind ca x=?, a-b=6
dau coroana

Answer 1

1) x(a-b) + 9(a-b) = 654
x*6 + 9*6 = 654
x*6 = 600 => x = 100

2) 7*a - 7*b +x = 55
7 (a-b) + x = 55
7*6 + x = 55
x = 55-42= 13

3) 13 + x - 5*a + 5*b = 201
13 + x - 5(a-b) = 201
x-5*6 = 188
x = 188+30
x = 218