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受欢迎的代数 >

solvefor x,a(x+3)+b(x-3)=3a+b

解答

求解

x, a (x + 3) + b (x - 3) = 3 a + b

解答

x = \frac{4 b}{a + b}; a \neq = - b

求解步骤

a (x + 3) + b (x - 3) = 3 a + b

乘开

a (x + 3) : a x + 3 a

a x + 3 a + b (x - 3) = 3 a + b

乘开

b (x - 3) : b x - 3 b

a x + 3 a + b x - 3 b = 3 a + b

将

3 a

到右边

a x + b x - 3 b = b

将

3 b

到右边

a x + b x = 4 b

分解

a x + b x : x (a + b)

x (a + b) = 4 b

两边除以

a + b; a \neq = - b

x = \frac{4 b}{a + b}; a \neq = - b

作图

流行的例子

solvefor n,l=(m(n+1))/2

so l v e f or n, l = \frac{m ( n + 1 )}{2}

3 x + 7 = 5 x - 2

5(2x+1)+4=6(3x+2)+7

5 (2 x + 1) + 4 = 6 (3 x + 2) + 7

(3y-5)/2 =15-2y

\frac{3 y - 5}{2} = 15 - 2 y

2/3 (9x+6)=6x+4

\frac{2}{3} (9 x + 6) = 6 x + 4