x=0 Ответ о a) 3 · (x+6) = 3x + 18 = 21x δ) 8 · (0,2x - 3) = 1,6x - 3 = 1,3x β) -6a · (x - 1) = -6a - 1 = 7a 2) (0,9 - 8x) · 5 = 4,5 - 8x = -3,7x

Решение:

• a)\[ 3(x+6) = 3x + 18 \]\[ 3x + 18 = 21x \]\[ 18 = 18x \]\[ x = 1 \]
• δ)\[ 8(0.2x - 3) = 1.6x - 3 \]\[ 1.6x - 3 = 1.3x \]\[ 0.3x = 3 \]\[ x = 10 \]
• β)\[ -6a(x - 1) = -6ax + 6a \]\[ -6a - 1 = 7a \]\[ -1 = 13a \]\[ a = -1/13 \]
• 2)\[ (0.9 - 8x) · 5 = 4.5 - 40x \]\[ 4.5 - 40x = -3.7x \]\[ 4.5 = 36.3x \]\[ x = 4.5 / 36.3 ≈ 0.12396694 \]

Ответ:

• a) x = 1
• δ) x = 10
• β) a = -1/13
• 2) x ≈ 0.12