Решите уравнение: а) 3у + 8 = 1 - 4у ____ ___ 6 7
б) 4у - 5у + 4 = - 2 5\8_____ _____ 3 12
а) 7*(3y+8)-6(1-4y)=0. 21y+56-6+24y=0. 45y=-50/ y=1,1/ б) 4y*4-5y-4=5,25. 16y-5y=5,25+4. 11y=9,25. y=0,84
а)7(3y+8)=6(1-4y)
21y+56=6-24y
21y+24y=6-56
45y=-50
y=- 50/45 = -10/9
б) 4y*4-(5y+4) = - 5
--------------- 2-----
12 8
16y-5y-4 = - 21
------------- ---
11y-4 = -21
-------- ----
2(11y-4)=-21*3
22y-8=-63
22y=8-63
22y=-55
y=-55/22
y=-5/2
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Answers & Comments
а) 7*(3y+8)-6(1-4y)=0. 21y+56-6+24y=0. 45y=-50/ y=1,1/ б) 4y*4-5y-4=5,25. 16y-5y=5,25+4. 11y=9,25. y=0,84
а)7(3y+8)=6(1-4y)
21y+56=6-24y
21y+24y=6-56
45y=-50
y=- 50/45 = -10/9
б) 4y*4-(5y+4) = - 5
--------------- 2-----
12 8
16y-5y-4 = - 21
------------- ---
12 8
11y-4 = -21
-------- ----
12 8
2(11y-4)=-21*3
22y-8=-63
22y=8-63
22y=-55
y=-55/22
y=-5/2