Question

急!!!请教教一下!!要有步骤!!(解一次元方程进一步)

Answer 1

更新1:

1. 8y = 6(y+1) 2. 2(z+1)=3(z-4) 3. 5(0.8n-1)=3n 4. 2x=3(1-x) - (x+1) 5.四份之t加四份之t等于一 6.五份之x - 15份之2x等于3 7.30份之k加5等于10份之k 8.6份之y等于 6 - 3份之4y

8y = 6y+6 8y - 6y - 6 = 0 2y - 6 = 0 2z+2 = 3z -12 2z - 3z + 2 +12 = 0 -z + 14 = 0 z - 14 = 0 4n - 5 = 3n 4n - 3n - 5 = 0 n - 5 = 0 2x = 3 - 3x - x - 1 2x + 3x + x - 3 + 1 = 0 6x - 2 = 0 T/4 + T/4 = 1 2T/4 = 1 2T = 1 * 4 2T - 4 = 0 X/5 - 2X/15 = 3 3X/15 - 2X/15 = 3 X/15 = 3 X = 3*15 X - 45 = 0 K/30 + 5 = K/10 K/30 - K/10 = -5 K/30 - 3K/30 = -5 -2K/30 = -5 2K = 150 2K -150 = 0 Y/6 = 6 - 4Y/3 Y/6 + 4Y/3 = 6 Y/6 + 8Y/6 = 6 9Y/6 = 6 9Y = 36 9Y - 36 = 0
参考: 自己
+ = 加
- = 减
* = 乘
/ = 除 1) 8y = 6(y+1) 8y = 6y + 6 8y - 6y = 6y + 6 - 6y 2y = 6 2y / 2 = 6 / 2 y = 3 2) 2(z+1)=3(z-4) 2z + 2 = 3z - 12 2z + 2 - 2z + 12 = 3z - 12 - 2z + 12 14 = z z = 14 3) 5(0.8n-1)=3n 4n - 5 = 3n 4n - 5 - 3n + 5 = 3n - 3n + 5 n = 5 4) 2x=3(1-x) - (x+1) 2x = 3 - 3x - x - 1 2x = 2 - 4x 2x + 4x = 2 - 4x + 4x 6x = 2 6x / 6 = 2 / 6 x = 1 / 3 5) 四份之t加四份之t等于一 t / 4 + t / 4 = 1 4(t / 4 + t / 4) = 1 * 4 t + t = 4 2t = 4 2t / 2 = 4 / 2 t = 2 6) 五份之x - 15份之2x等于3 x / 5 - 2x / 15 = 3 15(x / 5 - 2x / 15) = 3 * 15 3x - 2x = 45 x = 45 7) 30份之k加5等于10份之k k / 30 + 5 = k / 10 30(k / 30 + 5) = 30(k / 10) k + 150 = 3k k + 150 - k = 3k - k 150 = 2k 75 = k k = 75 8) 6份之y等于 6 - 3份之4y y / 6 = 6 - 4y / 3 6(y / 6) = 6(6 - 4y / 3) y = 36 - 8y y + 8y = 36 - 8y + 8y 9y = 36 9y / 9 = 36 / 9 y = 4
参考: 自己...... 数学做得多就识架啦..... 加油！