Răspuns :
a) x+2a+2b=17
x + 2(a+b)=17
x+2· 8 =17
x+16=17
x=17-16 ⇒x=1
a) 75-x= 5a+ 5b
75-x=5 (a+b)
75-x= 5 ·8
75-x= 40
x= 70-40
x= 35
ax-3(a+b)=8
4x- 3·8 =8
4x- 24=8
4x=24+8
4x=32
x=32: 4
x=8
Succes !
x + 2(a+b)=17
x+2· 8 =17
x+16=17
x=17-16 ⇒x=1
a) 75-x= 5a+ 5b
75-x=5 (a+b)
75-x= 5 ·8
75-x= 40
x= 70-40
x= 35
ax-3(a+b)=8
4x- 3·8 =8
4x- 24=8
4x=24+8
4x=32
x=32: 4
x=8
Succes !