Question

Stiind ca X =14, calculati a+b in fiecare din cazurile :
A) X*A+X*B+6*A+6*B =200

Answer 1

14*a+14*b+6*a+6*b=200 <=> 14(a+b) + 6(a+b) = 200 <=> (a+b)(14+6)=200 => a+b=10

Answer 2

xA+xB+6A+6B=200
x(A+B)+6(A+B)=200
14(A+B)+6(A+B)=200
20(A+B)=200
A+B=200:20
A+B=10