Răspuns :
6b = 36
B= 36/6
b=6
a - 3*6 = 9
a - 18=9
a=18+9
a=27
2x - 2a = 36
2x = 36+2a
2x= 36+2*27
2 x = 90
X=90/2
X=45
B= 36/6
b=6
a - 3*6 = 9
a - 18=9
a=18+9
a=27
2x - 2a = 36
2x = 36+2a
2x= 36+2*27
2 x = 90
X=90/2
X=45
a=3b+9 2x-6b+18:6b=36 2x-1+18=36 2x-19=36 2x=36+19 2x=55 x=55:2 x= te rog calculeaza tu