Question

Помогите решить уровнения 1) 8x-5=x-40. 2) 7x+21x= -3. 3) 9+13y=35+26y

Answer 1

8х - 5 = Х - 40
8x - x = 5 - 40
7x = - 35
X = - 5
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7x + 21x = - 3
28x = - 3
X = - 3/28
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9 + 13y = 35 + 26y
26y - 13y = 9 - 35
13y = - 26
y = - 2
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Answer 2

1)  8x-5=x-40
8x-x=-40+5
7x=-35
x=-35/7
x=-5

2) 7x+21x=-3
28x=-3
x=-3/28
(запиши как дробь)

3) 9+13y=35+26y
13y-26y=35-9
-13y=26
y=26/(-13)
y=-2