3a+7-4a+5+5a-2=4a+10=4*(-3)+10=-12+10=-2
b) –( 2a -b) – ( a – 2b) + ( a + b=-2a+b-a+2b+a+b=-2a+4b
Myślę że dobrze
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3a+7-4a+5+5a-2=4a+10=4*(-3)+10=-12+10=-2
b) –( 2a -b) – ( a – 2b) + ( a + b=-2a+b-a+2b+a+b=-2a+4b
Myślę że dobrze