(x+(x+12))*4=600 Решите уравнение.

Question

(x+(x+12))*4=600
Решите уравнение.

Answer 1

2X=600:4-12
2X=138
Х=138/2
Х=69

Comments

Проверка: (69+(69+12))*4=150*4=600

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600=600

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ответ:х=69

Answer 2

(x+(x+12))*4=600
x+(x+12)=150
2х+12=150
2х=138
х=69

Comments

Проверку можно??

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(69+(69+12))*4=(69+81)*4=150*4=600