a)-3(x-5)=2 i jedna druga razy (8-4x)
b)13 i dwie trzecie +x=-5 i jedna szósta
c)7x przez 2 + 2x przez 3 =11x+13 i dwie trzecie
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a)-3(x-5)=2½ * (8-4x)
-3x+15 = 5/2*(8-4x)
-3x+15 = 20-10x
-3x+10x = 20-15
7x = 5 |:7
x = 5/7
b)13 ⅔ +x=-5 ⅙
41/3+x = -31/6
82/6+x = -31/6
x = -31/6-82/6
x = -113/6
x = -18 5/6
c)7x/2 + 2x/3 =11x+13⅔
7x/2 + 2x/3 =11x+41/3 |*6
21x+4x = 66x+82
21x+4x-66x = 82
-41x = 82 |:(-41)
x = -2