Odpowiedź:
a.
2x+17=26-x
2x+x=26-17
3x=9 /:3
x=3
b.
11-x=3x+8
-x-3x=8-11
-4x=-3 /:(-4)
x=3/4
c.
-7(x+2)+4=-3x
-7x-14+4=-3x
-7x+3x=10
-4x=10 /:(-4)
x=-10/4
x=-2 1/2
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Odpowiedź:
a.
2x+17=26-x
2x+x=26-17
3x=9 /:3
x=3
b.
11-x=3x+8
-x-3x=8-11
-4x=-3 /:(-4)
x=3/4
c.
-7(x+2)+4=-3x
-7x-14+4=-3x
-7x+3x=10
-4x=10 /:(-4)
x=-10/4
x=-2 1/2