30*(60+а)=4500 120-40/k=40 (300-n)/20=9 70*x-150=60 5600/(360/k-20)=80

Question

30*(60+а)=4500
120-40/k=40
(300-n)/20=9
70*x-150=60
5600/(360/k-20)=80

Comments

и что с этим сделать?

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тип как уровнение

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уравнение*

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Уровнение решить

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1800+30а=4500, 30а=4500-1800,30а=2700,а=2700/30,а=90.

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(300-n)/20=9. 300-n=9*20.300-n=180.-n=180-300. -n= -120.n=120

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70*x-150=60. 70*x=60+150.x=210/70. x=3/

Answer 1

30*(60+а)=4500
60+a = 150
a = 150-60
a = 90

120-40/k=40
40/k = 120-40
40/k = 80
k = 80:40
k = 1/2

(300-n)/20=9
300-n = 180
n = 300-180
n = 120

70*x-150=60
70x = 60+150
70x = 210
x = 3

5600/(360/k-20)=80
360/k-20=5600/80
360/k-20 = 70
360/k = 70+20
360/k = 90
k = 360/90
k = 4