Решить уравнение:1.)( x - 1 ) • 60 = 502.)3x + ( x + 2 ) • 3 = 503.)15x = ( 1 - x ) •...

Question

Решить уравнение:
1.)
( x - 1 ) • 60 = 50
2.)
3x + ( x + 2 ) • 3 = 50
3.)
15x = ( 1 - x ) • 10
4.)
( x + 2 ) • 4 + ( x - 2 ) • 8 = 64
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Помогите пожалуйста.

Answer 1

60x - 60 = 50
60x = 60 + 50
60x = 110
x = 110/6
x = 1.8(3)

3x + 3x + 6 = 50
6x = 50 - 6
6x = 44
x = 44/6
x = 7.(3)

15x = 10 - 10x
15x + 10x = 10
25x = 10
x = 10/25
x = 0.4

4x + 8 + 8x - 16 = 64
4x + 8x = -8 + 16 + 64
12x = 72
x = 72/12
x = 6