Răspuns :
fie x numarul
12+2x=100 => 2x=88, x=44
x/2-18=1 => x/2=19, x=38
x/4+10=20 =>x/4=10, x=10*4=40
12+2x=100 => 2x=88, x=44
x/2-18=1 => x/2=19, x=38
x/4+10=20 =>x/4=10, x=10*4=40
(a x2)+12=100
a=100-12=88
88:2=44
(ax2)-18=1
a=1+18=19
19x2=38
(ax4)+10=20
a=20-10=10
10x4=40
a=100-12=88
88:2=44
(ax2)-18=1
a=1+18=19
19x2=38
(ax4)+10=20
a=20-10=10
10x4=40