1.2(2-7x), 2.4-8.4x, 12x+15x-42x, -15x, ∣x∣- 4=6, +10;-10, 3(x+7), 3x+21, x+12=27, x=15, 6(1.1-7x)=, 6.6-42x, x+5=10, x=5, -2.1x+5,2x+3.1x=, 6.2x, 12y+6y-24y=, -6y, 13x+6=32, x=2, 6x=22+14, x=6, 7+6x=x+22, x=3.

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