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受欢迎的代数 >

7a+5(a+3)=8a+4(a+2)

解答

7 a + 5 (a + 3) = 8 a + 4 (a + 2)

解答

无解

求解步骤

7 a + 5 (a + 3) = 8 a + 4 (a + 2)

乘开

5 (a + 3) : 5 a + 15

7 a + 5 a + 15 = 8 a + 4 (a + 2)

同类项相加:

7 a + 5 a = 12 a

12 a + 15 = 8 a + 4 (a + 2)

乘开

4 (a + 2) : 4 a + 8

12 a + 15 = 8 a + 4 a + 8

同类项相加:

8 a + 4 a = 12 a

12 a + 15 = 12 a + 8

将

15

到右边

12 a = 12 a - 7

将

12 a

para o lado esquerdo

0 = - 7

两侧不相等

无解

作图

流行的例子

1/3 x+1/4 = 2/5*(x-3/4)

\frac{1}{3} x + \frac{1}{4} = \frac{2}{5} \cdot (x - \frac{3}{4})

200 x + 50 = 8000

4(x+4)-2x=6(2x+1)

4 (x + 4) - 2 x = 6 (2 x + 1)

2/3 x+4/5 = 5/6 x-3/10

\frac{2}{3} x + \frac{4}{5} = \frac{5}{6} x - \frac{3}{10}

solvefor x,7x+5y+25=0

so l v e f or x, 7 x + 5 y + 25 = 0