Odpowiedź:
d) 15-3x+12=2x+6+2x
-3x-2x-2x=6-15-12
-7x=-21 /: -7
x=3
e) 5x-6x-42=8x-90-9x
5x-6x-8x+9x= -90+42
x= -48
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Odpowiedź:
d) 15-3x+12=2x+6+2x
-3x-2x-2x=6-15-12
-7x=-21 /: -7
x=3
e) 5x-6x-42=8x-90-9x
5x-6x-8x+9x= -90+42
x= -48