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2010-02-20T19:21:55+01:00
A)a+(a-b)= 2a -b
b)2x-(x+4)= x-4
c)7-(-x+6)= 7+x -6= x+1
d)-(x+4)+(x-5)=- x-4+x-5= -9
e)1-(t+p)-(t-2)= 1-t-p-t+2= -2t-p+2
f)-(-y+2)+(-2y-4)= y-2-2y-4= y-6
2010-02-20T19:22:39+01:00
A) 2a-b
b)x-4
c) 1+x
d)-9
e)3+2t-p
f)-y-6
2010-02-20T19:22:56+01:00
2a-b
x-4
1+x
x-4+x-5=-9
1-t-p-t+2=3-2t-p
y-2-2y-4=-y-6