Решите уравнение спомощью пропорции 1) 7 1/2:4 1/2=x:8 1/3 2) 55 : x = 7.4:74. Created by danil101286. matematika-ru

3 2) 55 : x = 7.4:74...

July 2022 1 127 Report

Решите уравнение спомощью пропорции
1) 7 1/2:4 1/2=x:8 1/3
2) 55 : x = 7.4:74

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сухарик05 7 1/2:4 1/2=x:8 1/3
x*4 1/2=7 1/2*8 1/3 7 1/2*8 1/3=15/2*25/3=125/2
x*4 1/2=125/2
x=125/2:4 1/2 125/2:4 1/2=125/2:9/2=125/2*2/9=125/9=13 8/9
x=13 8/9

55:x=7,4:74
х*7,4=55*74
х*7,4=4070
х=4070:7,4
х=550

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