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It is 5x - 4
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2X2+5x-12 4+5x-12 -8+5x 5x-8
x=12
5x-8 = x+125x-x = 8+124x = 20x=5
6x - 3x = 5x - 10x + 12 6x - 3x - 5x + 10x = 12 8x = 12 8x/8 = 12/8 x = 12/8 = 3/2 x = 1.5
5x+(6-3x)+8=5x+6-3x+8=2x+14 2x + 14