раскройте скобки и упростите 1)15x-(6x-12y) 2)4.6a+(9.7b-5.6a) 3)2(x+4)+3(15-4x)
1) 15х-(6х-12у)=15х-6х+12у=9х+12у
2)4,6а+(9,7b-5.6a)=4.6a+9.7b-5.6a=-1.6a+9.7b
3)2(х+4)+3(15-4х)=2х+8+45-12х=-10х+53
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Answers & Comments
1) 15х-(6х-12у)=15х-6х+12у=9х+12у
2)4,6а+(9,7b-5.6a)=4.6a+9.7b-5.6a=-1.6a+9.7b
3)2(х+4)+3(15-4х)=2х+8+45-12х=-10х+53