Question

!!!СРОЧНО!!!
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Answer 1

а)

$6 - x = 3( - 8 + 3x) \\ 6 - x = - 24 + 9x \\ - x - 9x = - 24 - 6 \\ - 10x = - 30 \\ x = \frac{ - 30}{ - 10} = 3 \\ x = 3$

б)

$- 3(2x + 1) = - 33 - 3x \\ - 6x - 3 = - 33 - 3x \\ - 6x + 3x = - 33 + 3 \\ - 3x = - 30 \\ x = \frac{ - 30}{ - 3} = 10 \\ x = 10$

в)

$0.4(7 - 5a) = - 2 + 0.4a \\ 2.8 - 2a = - 2 + 0.4a \\ - 2a - 0.4a = - 2 - 2.8 \\ - 2.4a = -4.8 \\ a = \frac{ - 4.8}{ - 2.4} = 2 \\ a = 2$

г)

$- 1.6(x - 6) = - 1.2(x - 8) \\ - 1.6x + 9.6 = - 1.2x + 9.6 \\ - 1.6x + 1.2x = 9.6 - 9.6 \\ - 0.4x = 0 \\ x = \frac{0}{ - 0.4} = 0 \\ x = 0$