Найди корни уравнений: x+3=-9x

Привет! Давай решим уравнения. 1) $x + 3 = -9x$ $x + 9x = -3$ $10x = -3$ $x = -3/10 = -0.3$ 2) $-3x - 9 = 2x$ $-3x - 2x = 9$ $-5x = 9$ $x = -9/5 = -1.8$ 3) $6x + 1 = -4x$ $6x + 4x = -1$ $10x = -1$ $x = -1/10 = -0.1$ 4) $-2x - 4 = 3x$ $-2x - 3x = 4$ $-5x = 4$ $x = -4/5 = -0.8$ 5) $3x + 3 = 5x$ $3 - 5x = -3x$ $2x = 3$ $x = 3/2 = 1.5$ 6) $-8x - 3 = -6x$ $-8x + 6x = 3$ $-2x = 3$ $x = -3/2 = -1.5$ 7) $7 + 8x = -2x - 5$ $8x + 2x = -5 - 7$ $10x = -12$ $x = -12/10 = -1.2$ 8) $-5 + 9x = 10x + 4$ $9x - 10x = 4 + 5$ $-x = 9$ $x = -9$ 9) $1 - 10x = -5x + 10$ $-10x + 5x = 10 - 1$ $-5x = 9$ $x = -9/5 = -1.8$ 10) $-4 - 6x = 4x - 3$ $-6x - 4x = -3 + 4$ $-10x = 1$ $x = -1/10 = -0.1$ 11) $2 + 3x = -7x - 5$ $3x + 7x = -5 - 2$ $10x = -7$ $x = -7/10 = -0.7$ 12) $-1 - 3x = 2x + 1$ $-3x - 2x = 1 + 1$ $-5x = 2$ $x = -2/5 = -0.4$ 13) $4(x - 8) = -5$ $4x - 32 = -5$ $4x = -5 + 32$ $4x = 27$ $x = 27/4 = 6.75$ 14) $10(x - 9) = 7$ $10x - 90 = 7$ $10x = 7 + 90$ $10x = 97$ $x = 97/10 = 9.7$ 15) $5(x + 9) = -8$ $5x + 45 = -8$ $5x = -8 - 45$ $5x = -53$ $x = -53/5 = -10.6$ 16) $4(x + 1) = 9$ $4x + 4 = 9$ $4x = 9 - 4$ $4x = 5$ $x = 5/4 = 1.25$ 17) $10(x + 2) = -7$ $10x + 20 = -7$ $10x = -7 - 20$ $10x = -27$ $x = -27/10 = -2.7$ 18) $5(x - 6) = 2$ $5x - 30 = 2$ $5x = 2 + 30$ $5x = 32$ $x = 32/5 = 6.4$ **Ответы:** 1) -0.3 2) -1.8 3) -0.1 4) -0.8 5) 1.5 6) -1.5 7) -1.2 8) -9 9) -1.8 10) -0.1 11) -0.7 12) -0.4 13) 6.75 14) 9.7 15) -10.6 16) 1.25 17) -2.7 18) 6.4