1) 3 (5+x/2) =4+2x
2)0,71x+1,98=0,37x-1,76
3) 5 ( 5x -1)-2,7x+0,2x=6,5-0,5x
2)0,71x+1,98=0,37x-1,76
3) 5 ( 5x -1)-2,7x+0,2x=6,5-0,5x
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Ответ:
1)х=22
2)х=-11
3)х=23/26≈0.9
Объяснение:
1)15+3х/2-2х=4
3х-4х=8-30
х=22
2)0.71х-0.37х=-1.76-1.98
0.34х=-3.74
х=-11
3) 15х-5-2.5х+0.5х=6.5
13х=11.5
х=23/26≈0.9