-7+2(7х-2)=10
-7+14х-4=10
14х=10+7+4
х=1 1/2
-7-2(5х-6)=-2
-7-10х-12=-2
-10х=-2+7+12
х=-1 7/10
-2=-9-2(-2х+1)
-2=-9+4х-2
4х=-2+9+2
х=2 1/4
<span>9х^2-7(х+4)*(4-х)-(1-4Х)^2=15</span>
(16 - 4x)/7 = 1/35
35( 16 - 4x) = 7
5 (16 - 4x) = 1
80 - 20x = 1
- 20x = - 79
x = 3,95
Б)=-6б
г)=9-11у
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