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1/2+16分之15x=8分之七解方程计算怎么计算

7x/8 = 11/16 ==> x = 11/16 * (8/7) = 11/12 x*(3/4+2/3) = 7/24 ==> x* (17/12) = 7/24 ==> x = 7/24 * (12/17) = 7/34 x - 3x/5 = 4/5 ==> 2x/5 = 4/5 ==> x = 4/5 * (5/2) = 2 6 * 1/12 - x/2 = 1/2 ==> 1/2 - x/2 = 1/2 ==> x = 0

9/8 -2/7 +7/8 +5/7 =9/8 +7/8 +5/7 -2/7 =16/8+3/7 =2+ 3/7 =17/7

解: 8×1/16-2.5X=1/6 1/2-2.5X=1/6 2.5X=1/2-1/6 5/2X=1/3 X=1/3×2/5 X=2/15

1/2-3/8+x=13/16 x=13/16-1/2+3/8 x=11/16 望采纳!!

8x+16=2x+14 8x-2x=14-16 6x=-2 x=负三分之一

解: 1/4 ÷(1/2+2x/5)=16 16*(1/2+2x/5)=1/4 8+32x/5=1/4 32x/5=-8+1/4 32x/5=-31/4 x=-155/128 检验把x=-155/128代入原方程 左式=1/4÷[1/2+2/5 *(-155/128)] =1/4÷[1/2-31/64] =1/4÷ 1/64 =16 =右式 所以x=-155/128是原方程的根.

①x+30%x=52 (1+30%)x=52 1.3x=52 1.3x÷1.3=52÷1.3 x=40;②23x+34x=16(23+34)x=16 1712x=161712x×1217=16×1217 x=217;③(75%+1)x=63% 1.75x=0.631.75x÷1.75=0.63÷1.75 x=0.36;④56x-14=0.75.56x-14+14=0.75+14 56x=1 56x×65=1×65 x=115.

(1) 7 9 x+4× 1 2 =16, 7 9 x+2=16, 7 9 x+2-2=16-2, 7 9 x=14, 7 9 x÷ 7 9 =14÷ 7 9 . x=18;(2) 8 9 x+ 1 2 x=5, 25 18 x=5, 25 18 x÷ 25 18 =5÷ 25 18 , x= 18 5 .

x=2.8

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