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1.Zapisz w najprostszej postaciwyrażenia:
a)(0.04x-1.4)+(-0.3x+0.4)=
b)x+[2x-(3/4a+1)]=
c)a-[b-(a+b)]=
d)3x-[-2x+1-(4x+5)-4]=
e)1.14x-(0.8y-0.2x)-1.2y=
f)3.21-4.7x-(2.3-4.07x)-4.08=
g)(-9mn+3m-1)-(-8mn+3m-7n+1)-7n=
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a)(0.04x-1.4)+(-0.3x+0.4)=0.04x-1.4-0.3x+0.4= -0.26x-1
b)x+[2x-(3/4a+1)]=x+[2x-3/4a-1]=x+2x-3/4a-1=3x-3/4a-1
c)a-[b-(a+b)]=a-[b-a-b]=a-b+a+b=2a
d)3x-[-2x+1-(4x+5)-4]=3x-[-2x+1-4x-5-4]=3x+2x-1+4x+5+4=9x+8
e)1.14x-(0.8y-0.2x)-1.2y=1.14x-0.8y+0.2x-1.2y=1.34x-2y
f)3.21-4.7x-(2.3-4.07x)-4.08=3.21-4.7x-2.3+4.07x-4.08=-3.17-0.63x
g)(-9mn+3m-1)-(-8mn+3m-7n+1)-7n=-9mn+3m-1+8mn-3m+7n-1-7n= -mn-2