Решите уравнения : 1)х=2/3х+1 2)х-1/2=3/4х 3)х-2/3=5/6х 4)1 4/5у=у+4 5)2/3у-1/3=5/9у ...

Question

Решите уравнения : 1)х=2/3х+1
2)х-1/2=3/4х
3)х-2/3=5/6х
4)1 4/5у=у+4
5)2/3у-1/3=5/9у
6)3/4у-2/3=7/12у Заранее спасибо!

Answer 1

1) x = 2/3x+1
x-2/3x = 1
3/3x-2/3x = 1
1/3x = 1
x = 1*3 = 3

2) x-1/2 = 3/4x
x-3/4x = 1/2
4/4x-3/4x = 1/2
1/4x = 1/2
x = (1/2)*4
x = 2
3) x-2/3 = 5/6x
x-5/6x = 2/3
6/6x-5/6x = 2/3
1/6x = 2/3
x = (2/3)*6
x = 4

4) 1 4/5y = y+4
1 4/5y -y = 4
4/5y = 4
y = 4*(5/4)
y = 5

5) 2/3y-1/3 = 5/9y
2/3y-5/9y = 1/3
6/9y-5/9y = 1/3
1/9y = 1/3
y = 1/3*(9/1)
y = 3

6) 3/4y-2/3 = 7/12y
3/4y-7/12y = 2/3
9/12y-7/12y = 2/3
2/12y = 2/3
y = (2/3)*(12/2)
y = 4

Comments

Большое спасибо :)

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Удачки!))