Ответ:
a) x = 2
б) x = 13/2 , 2x = 13
Решение:
a)
4x - 2 (14-3x) = -8
4x - 28 + 6x = -8
10x - 28 = -8
10x= -8 + 28
10x = 20 (разделить обе стороны)
x= 2
b)
2(2x + 3) - ( 2x + 7) = 12
4x + 5 - 2x - 7 = 12
2x - 1 = 12
2x = 12 + 1
2x = 13
x = 13/2
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Answers & Comments
Ответ:
a) x = 2
б) x = 13/2 , 2x = 13
Решение:
a)
4x - 2 (14-3x) = -8
4x - 28 + 6x = -8
10x - 28 = -8
10x= -8 + 28
10x = 20 (разделить обе стороны)
x= 2
b)
2(2x + 3) - ( 2x + 7) = 12
4x + 5 - 2x - 7 = 12
2x - 1 = 12
2x = 12 + 1
2x = 13
x = 13/2