(1)96-5x=42 96-5x+5x=42+5x5x+42=965x+42-42=96-4
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(1)96-5x=42
96-5x+5x=42+5x 5x+42=96 5x+42-42=96-42 5x=54 5x÷5=54÷5 x=10.8; (2)8x+0.4×1.2=2.4 8x+0.48=2.4 8x+0.48-0.48=2.4-0.48 8x=1.92 8x÷8=1.92÷8 x=0.24; (3)7.2-5x=3.6 7.2-5x+5x=3.6+5x 5x+3.6=7.2 5x+3.6-3.6=7.2-3.6 5x=3.6 5x÷5=3.6÷5 x=0.72; (4)9x÷3=5.4 9x÷3×3=5.4×3 9x=16.2 9x÷9=16.2÷9 x=1.8; (5)2.9x+1.28=7.08 2.9x+1.28-1.28=7.08-1.28 2.9x=5.8 2.9x÷2.9=5.8÷2.9 x=2; (6)4x-19.5=4.1 4x-19.5+19.5=4.1+19.5 4x=23.6 4x÷4=23.6÷4 x=5.9.
求未知数x5x=4x+8
4x+5x+14=42-2(x+3)
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
解方程X-1/5X=24 X-1/8X=42 X-1/9X=64
(X+7)(X+5)-(X+1)(X+5)=42
(x+7)(x+5)-(x+1)(x+5)=42解方程
2(x+5)^2-(x+6)^2-(x+2)(x-2)=42 (2x+1)(x-3)-(2x+3)(x-1)大于等于12
解方程(x+7)(x+5)-(x-1)(x+1)(x+5)=42
13x+42-5x=104-12x-22
5/9X+X=42
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
解方程 (x+7)(x+5)_(x+1)(x+5)=42
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