Question

-6=-9×(7-8х)+4х
чему равен х
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Answer 1

$- 6 = - 9 \times (7 - 8x) + 4x \\ - 6 = - 63 + 72x + 4x \\ - 6 = - 63 + 76x \\ - 6 + 63 = 76x \\ 57 = 76x \\ x = 57 \div 76 \\ \boldsymbol{x = 0.75}$

Answer 2

- 6 = - 9 · ( 7 - 8х ) + 4х ;

- 6 = - 63 + 72х + 4х ;

- 6 = - 63 + 76х ;

- 76х = - 63 + 6 ;

- 76х = - 57 ;

76х = 57 ;

х = 57 : 76 ;

х = 57/76 ;

х = 3/4 = 0,75.

Ответ : х = 0,75.