Răspuns:
Salut
a)3x+7/10 - 4x-9/18 =12x+7/45 +1/10
9(3x+7)-5(4x-9)=2(12x+7)+9
27x+63-20x+45=24x+14+9
7x+108=24x+23
24x-7x=108-23
17x=85
x=5.
b)2x-3/3 - 4x+3/4=2-3x/2 - 5/12
4(2x-3)-3(4x+3)=6(2-3x)-5
8x-12-12x-9=12-18x-5
-4x-21=7-18x
-4x+18x=7+21
14x=28
x=2.