✨ Best Answer ✨
(4) -9x-5+9x-2
●同類項の計算[-9x+9x=0、-5-2=-7]
=-7
(5) 12y-3+5y+1
●同類項の計算[12y+5y=17y、-3+1=-2
=17y-2
(6) -6-a+15+2a
●同類項の計算[-a+2a=a、-6+15=+9
=a+9
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✨ Best Answer ✨
(4) -9x-5+9x-2
●同類項の計算[-9x+9x=0、-5-2=-7]
=-7
(5) 12y-3+5y+1
●同類項の計算[12y+5y=17y、-3+1=-2
=17y-2
(6) -6-a+15+2a
●同類項の計算[-a+2a=a、-6+15=+9
=a+9
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