(7/2+4/9)x+3/18=5/18
71/18x+3/18=5/18
71/18x=2/18
x=28/71
<span>6(а+1,5)-2,8а=</span>6а+9-2,8а=3,2а+9
3,2*1,5+9=4,8+9=13,8
(×-1):116-0 1)
×=116×0
×=0
×=0+1
×=1
2) ×÷125=1
×=125×1
×=125
Ответ:
b : 8 = 27 213 + 35 857
b = 63 070*8
b = 504 560
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504 560 : 8 = 27 213 + 35 857
63 070=63 070
93*z =43 617:7
Z=6 231:93
Z=67
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93*67 =43 617:7
6 231=6 231