3(х+1) + 2(5-х) = 16-13х общ. знам.=24
8 3 12
3*3(х+1)+8*2(5-х) =2*(16-13х)
9(х+1) +16(5-х)=32-26х
9х+9+80+16х=32-26х
9х-15х+26х=32-9-80
19х=-57
х=-3
5(7-2х) - 4х-2 = х-19 6*5(7-2х)-2(4х-2)=9(х-19)
3 9 2
30(7-2х)-8х+4=9х-171
210-60х-8х+4=9х-171
9х+8х+60х=210+4+171
77х=385
х=5