Răspuns:
Vezi rezolvarile mai jos:
Explicație pas cu pas:
a) ( y : 2 ) * 3 = 10 * 3
( y : 2 ) * 3 = 30
y : 2 = 30 : 3
y : 2 = 10
y = 10 * 2
y = 20
b) ( 7 * 9 - b * 5 ) - 9 : 3 = 20
( 63 - b * 5 ) - 3 = 20
63 - b * 5 = 20 + 3
63 - b * 5 = 23
b * 5 = 63 - 23
b * 5 = 40
b = 40 : 5
b = 8
c) 60 - 10 : ( 37 - 4 * x ) = 50
10: ( 37 - 4 * x ) = 60 - 50
10: ( 37 - 4 * x ) = 10
37 - 4 * x = 10 * 10
37 - 4 * x = 100
4 * x = 100 - 37
4 * x = 63
x = 63 : 4
x = 15 r 3
d) 20 * 10 * 30 * 40 * a = 0
200 * 30 * 40 * a = 0
6000 * 40 * a = 0
240000 * a = 0
a = 240000 : 0
a = 0
