264. Решите уравнения: 7
1) 222 – (560 : x + 27) = 188;
2) 720 : (5y - 12) – 56 = 34;
3) 900 – (14n + 8) : 20 = 894;
4) (50m 85) : 9 + 48 = 83;
5) (410 – 3z) : 7 + 70 = 120.
Срочно плиз
1) 222 – (560 : x + 27) = 188;
2) 720 : (5y - 12) – 56 = 34;
3) 900 – (14n + 8) : 20 = 894;
4) (50m 85) : 9 + 48 = 83;
5) (410 – 3z) : 7 + 70 = 120.
Срочно плиз
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Ответ:
Пошаговое объяснение:
1) 222 – (560 : x + 27) = 188
560 : х +27= 222- 188
560 : х +27 = 34
560 : х= 34 - 27
560 : х = 7
х= 560 : 7
х= 80
2) 720 : (5y - 12) – 56 = 34
720 : (5у - 12)= 100
5у - 12 =720 : 100
5у- 12=7,2
5у= 19,2
у= 19,2 : 5
у=3,84
3) 900 – (14n + 8) : 20 = 894
(14х+8) : 20= 900 - 894
(14х+8) : 20=6
(14х+8)=6* 20
14х+8=120
14х=120-8
14х=112
Х=112:14
Х=8
4) (50m- 85) : 9 + 48 = 83
(50m -85) :9=83-48
(50m -85) :9 =35
50m -85= 35*9
50m -85= 315
50m = 315+85
50m=400
m=400:50
m=8
5) (410 – 3z) : 7 + 70 = 120
(410 - 3z ) :7= 120-70
(410 - 3z) :7= 50
(410 - 3z) = 50 * 7
(410 - 3z) = 350
410 - 350 =3z
3z = 60
z=60 : 3
z=20