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b]
10x+15>2x-6+x
7x>-21
x>-3
-y-y+2y<5-3
0y<2 sprzeczne
b)
10x+15>2x-6+x
10x-2x-x>-6-15
7x>-21 /:7
x>3
2y<2
y<1
5(2x+3)>2(x-3)+x
10x+15>2x-6+x
7x>-21/7
x>-3