Ответ: 1. 5x + 4 = x + 125х-х=12-44х=8Х=8:4Х=22. 13 – 5y = 8 – 2y 2у-5у=8-13-3у=-5У=-5:(-3)У=1 2/33. 5x + (3x – 7) = 9 5х+3х-7=95х+3х=9+78х=16Х=16:8Х=24. 3y – (5 – y) = 113у-5+у=113у+у=11+54у=16У=16:4У=45. (7a + 1) – ( 6a + 3) = 5 7а+1-6а-3=57а-6а=5+3-1А=76. (8s + 11) – 13 = 9s– 5 8s+11-13=9s-58s-9s=-5-11-s=-16S=167. (5x – 3)+(7x – 4) = 8 – (15 – 11x) 5x-3+7х-4=8-15+11х5х+7х-11х=8-15+4+3Х=08. (7 – 5k) – (8 – 4k) + (5k + 6) = 8 7-5к-8+4к+5к+6=85к-5к+4к=8-6+8-74к=3К=3:4К=0,759. 2x + 5 = 2(x + 1) + 11 2х+5=2х+2+112х-2х=2+11-50х=8Х=решений нет 10. 15(v + 2) – 30 = 15v 15v+30-30=15v15v-15v=30-300v=0V=решений нет 11. 5(3x + 1,2) + x = 6,8 15х+6+х=6,815х+х=6,8-616х=0,8Х=0,8:16Х=0,0512. 0,4b + 3 = 0,2(3b + 1) – b 0,4b-0,6b+b=0,2-30,2b=-2,8B=-2,8:0,2B=-1413. 6(x – 1) = 9,4 – 1,7x 6х-6=9,4-1,7х6х+1,7х=9,4+67,7х=15,4Х=15,4:7,7Х=214. 3,5 – 9a = 2(0,5a – 4) -9а-а=-8-3,5-10а=11,5А=11,5:(-10)А=-1,1515. 3(2,4 – 1,1m) = 2,7m + 3,2 7,2-3,3m=2,7m+3,2-3,3m-2,7m=3,2-7,2-6m=-4M=-4:(-6)M=2/316. 3(x – 1) = 2(2 – x) + 6 3х-3=4-2х+63х+2х=4+6+35х=13Х=13:5Х=2,617. 4(3 – h) – 11 = 7(2h– 5) 12-4h-11=14h-35-4h-14h=11-35-12-18h=-36H=-36:(-18)H=218. –3(3y + 4) + 4(2y – 1) = 0 -9у-12+8у-4=0-9у+8у=4+12-у=16У=-1619. 0,3(5x – 7) = 3(0,2x + 3,2) 1,5х-2,1=0,6х+9,61,5х-0,6х=9,6+2,10,9х=11,7Х=11,7:0,9Х=1320. 4(1,2b + 3,7) – 2,8 = 5,2b 4,8b+14,8-2,8=5,2b4,8b-5,2b=2,8-14,80,4b=-12B=-12:0,4B=-3021. 0,9(4y – 2) = 0,5(3y – 4) + 4,4 3,6у-1,8=1,5у-2+4,43,6у-1,5у=4,4-2+1,82,1у=4,2У=4,2:2,1У=222. 4(0,2x – 7) – 5(0,3x + 6) = 5 0,8х-28-1,5х-30=50,8х-1,5х=5+30+28-0,7х=63Х=63:(-0,7)Х=-90