Odpowiedź:
1.
2x+9=1
2x=1-9
2x=-8
x=-4
2.
2x+7=x-1
2x-x=-1-7
x=-8
3.
5(x-7)+2=28
5x-35+2=-28
5x=-28+33
5x=5
x=1
4.
4(3-x)+9=7(2+x)+29
12-4x+9=14+7x+29
-4x-7x=29-3
-11x=26
x= - 2 4/11
5.
9=5x+6-5(x-0,6)
9= 5x+6-5x+3
0=0
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Odpowiedź:
1.
2x+9=1
2x=1-9
2x=-8
x=-4
2.
2x+7=x-1
2x-x=-1-7
x=-8
3.
5(x-7)+2=28
5x-35+2=-28
5x=-28+33
5x=5
x=1
4.
4(3-x)+9=7(2+x)+29
12-4x+9=14+7x+29
-4x-7x=29-3
-11x=26
x= - 2 4/11
5.
9=5x+6-5(x-0,6)
9= 5x+6-5x+3
0=0