Раскройте скобки и приведите подобные
3(x+3)-3(4-x)-x-3
3(x+5)-(4-x)-(1+3)x-3
2(x+4)-3(2-x)-x-4
3(x+3)-3(4-x)-x-3
3(x+5)-(4-x)-(1+3)x-3
2(x+4)-3(2-x)-x-4
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Answers & Comments
3(х+5)-(4-х)-(1+3)х-3=3х+15-4+х-4х-3=8
2(х+4)-3(2-х)-х-4=2х+8-6+3х-х-4=4х-2