Răspuns :
Răspuns:
4x=3(5·27:15-1)
4x=15·81:15-1
4x=81-1
x=80:4
x=20
______________
9x=5(3·32:12+1)
9x=5(8+1)
9x=45
x=45:9
x=5
_______
7x=3(2·125:10-4)
7x=3(25-4)
7x=3·21
x=63:7
x=9
Răspuns:
4x=3(5·27:15-1)
4x=15·81:15-1
4x=81-1
x=80:4
x=20
______________
9x=5(3·32:12+1)
9x=5(8+1)
9x=45
x=45:9
x=5
_______
7x=3(2·125:10-4)
7x=3(25-4)
7x=3·21
x=63:7
x=9