Question

[tex]a \times b + a \times c - a \times d = 288 \\ b + c - d = 12 \\ aflati ce valoare are A

Answer 1

a * b + a *c - a * d = 288
a * (b + c - d) = 288 (am scos factorul comun a)
din ecuatia 2 => b + c - d = 12
a * 12 = 288
a = 24;