4x+5x=, 9x, 22x, 4x, 9v, 8x+7x=, 15x, 15v, 16x, 3x+4x=560, x=80, x=90, x=56, x=89, 3x=670+7x, x=67, x=34, x=88, x=65, 7x+3x=320, x=32, v=43, 70 -18x=8x, x=70, x=66, 360-6x=6x, x=30, x=45, x=89, x=88.

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