Question

determina nr.din relatie si verifica 5+30-10×z=25-5×4; ex.70:y-10=2×0:6

Answer 1

5+30-10×z= 25-5×4
5+30-10z= 25-20
5+30-10z= 5
35-10z= 5
10z= 35-5
10z= 30
z= 30:10
z= 3

PROBA:
5+30-30= 25-5×4
35-30= 25-20
5= 5

70:y-10= 2×0:6
70:y-10= 0:6
70:y-10=0
70:y= 10
y= 70:10
y= 7

PROBA:
70:7-10= 2×0:6
10-10= 0
0=0