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受欢迎的代数 >

3x+[-5x-(x+3)]=8x+(-5x-9)

解答

3 x + [- 5 x - (x + 3)] = 8 x + (- 5 x - 9)

解答

x = 1

求解步骤

3 x + [- 5 x - (x + 3)] = 8 x + (- 5 x - 9)

去除括号:

(- a) = - a

3 x - 5 x - (x + 3) = 8 x + (- 5 x - 9)

同类项相加:

3 x - 5 x = - 2 x

- 2 x - (x + 3) = 8 x + (- 5 x - 9)

去除括号:

(- a) = - a

- 2 x - (x + 3) = 8 x - 5 x - 9

同类项相加:

8 x - 5 x = 3 x

- 2 x - (x + 3) = 3 x - 9

展开

- 2 x - (x + 3) : - 3 x - 3

- 3 x - 3 = 3 x - 9

将

3

到右边

- 3 x = 3 x - 6

将

3 x

para o lado esquerdo

- 6 x = - 6

两边除以

- 6

x = 1

作图

流行的例子

solvefor x,2x+3y=8

so l v e f or x, 2 x + 3 y = 8

solvefor x,3x-2y=-2

so l v e f or x, 3 x - 2 y = - 2

solvefor x,x-3y=3

so l v e f or x, x - 3 y = 3

solvefor x,2x-y=-3

so l v e f or x, 2 x - y = - 3

solvefor x,2x+y=-4

so l v e f or x, 2 x + y = - 4