Răspuns :
2/4*x=12
2x/4=12/1
2x=4*12
=48
x=24
3/5*x=21
3x/5=21/1
3x=21*5
= 105
x=35
4/10*x=36
4x/10=36/1
4x=360
x=90
2x/4=12/1
2x=4*12
=48
x=24
3/5*x=21
3x/5=21/1
3x=21*5
= 105
x=35
4/10*x=36
4x/10=36/1
4x=360
x=90
daca ai x necunoscuta pt fiecare caz:
1) 2•x/4=12 => x=12•4/2=24
2) 3•x/5=21 => x=21•5/3=35
3) 4•x/10=36 => x=36•10/4=90
1) 2•x/4=12 => x=12•4/2=24
2) 3•x/5=21 => x=21•5/3=35
3) 4•x/10=36 => x=36•10/4=90