Помогите !!!!!!!!!!!!!!!!!!

Question

Помогите !!!!!!!!!!!!!!!!!!

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Answer 1

Решение на фотографии

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Answer 2

1. х/5-х/2=1
2х-5х=10
-3х=10
х=10÷(-3)
х=-3 1/3

2. 5х+2×(3-4х)=2х+21
5х+6-8х=2х+21
-3х-2х=21-6
-5х=15
х=15÷(-5)
х=-3

3. (х-4)^2=х^2-16
х^2-8х+16=х^2-16
х^2-8х-х^2=16-16
-8х=0
х=0÷(-8)
х=0