Odpowiedź:
B) y+2y-5 = 11 - y
C) 3a+4=(a-1) + (a+7)
a) x+2x=x+9
3x-x=9
2x=9 |:2
x=4,5
b) y+2y-5=11-y
4y=16 |:4
y=4
c) 3a+4=a-1+a+7
a=2
d) 10-2b+6-b=10-b+4-b
-b=-2 |*(-1)
b=2
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Odpowiedź:
B) y+2y-5 = 11 - y
C) 3a+4=(a-1) + (a+7)
a) x+2x=x+9
3x-x=9
2x=9 |:2
x=4,5
b) y+2y-5=11-y
4y=16 |:4
y=4
c) 3a+4=a-1+a+7
a=2
d) 10-2b+6-b=10-b+4-b
-b=-2 |*(-1)
b=2