4x
mnoze obustronnie przez 36 i otrzymuje:
4*4x + 3*5x =36
16x + 15x =36
31x =36 /:31
x = 36/31
x= 1 5/36
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mnoze obustronnie przez 36 i otrzymuje:
4*4x + 3*5x =36
16x + 15x =36
31x =36 /:31
x = 36/31
x= 1 5/36