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9x-2x=15-4
7x=11 /:7
x=11/7
x=1 4/7
b) 7p-3>4p+21
7p-4p>21+3
3p>24 /:3
p>8
9x+4=2x+15
9x-2x=15-4
7x=11/:7
x=11/7
x=1 4/7
b)
7p-3>4p+21
7p-4p>21+3
3p>24/:3
p>8