zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的代数 >

3a+2b=54,5a+4b=92

解答

3 a + 2 b = 54, 5 a + 4 b = 92

解答

a = 16, b = 3

求解步骤

[3 a + 2 b = 54 5 a + 4 b = 92]

对于

3 a + 2 b = 54

将

a

移到一边:

a = \frac{54 - 2 b}{3}

替代

a = \frac{54 - 2 b}{3}

[5 \cdot \frac{54 - 2 b}{3} + 4 b = 92]

化简

[\frac{270 + 2 b}{3} = 92]

对于

\frac{270 + 2 b}{3} = 92

将

b

移到一边:

b = 3

对于

a = \frac{54 - 2 b}{3}

替代

b = 3

a = \frac{54 - 2 \cdot 3}{3}

\frac{54 - 2 \cdot 3}{3} = 16

a = 16

方程组的解为:

a = 16, b = 3

作图

流行的例子

2x+3y=7,6x-5y=11

2 x + 3 y = 7, 6 x - 5 y = 11

3x+2y-z=4,x+y+z=6,2x-y+z=3

3 x + 2 y - z = 4, x + y + z = 6, 2 x - y + z = 3

a=-12,b=-8/11 ,c=-7/12

a = - 12, b = - \frac{8}{11}, c = - \frac{7}{12}

2 x/x-3+1/2 x=3,x+9/((x-3))(2x+3)=0

2 \frac{x}{x} - 3 + \frac{1}{2} x = 3, x + \frac{9}{( x - 3 )} (2 x + 3) = 0

2x-5y=1,6-3x+6y=21

2 x - 5 y = 1, 6 - 3 x + 6 y = 21