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受欢迎的代数 >

75+2x+5x=3(120-x)

解答

75 + 2 x + 5 x = 3 (120 - x)

解答

x = \frac{57}{2}

+1

十进制

x = 28.5

求解步骤

75 + 2 x + 5 x = 3 (120 - x)

同类项相加:

2 x + 5 x = 7 x

75 + 7 x = 3 (120 - x)

展开

3 (120 - x) : 360 - 3 x

75 + 7 x = 360 - 3 x

将

75

到右边

7 x = - 3 x + 285

将

3 x

para o lado esquerdo

10 x = 285

两边除以

10

x = \frac{57}{2}

作图

流行的例子

3(a-2)-(a+6)=4(a-1)

3 (a - 2) - (a + 6) = 4 (a - 1)

- 91 = 10 p + 9

x + (x - 6) = 90

4(x+7)=2(x+12)+2(x+1)

4 (x + 7) = 2 (x + 12) + 2 (x + 1)

solvefor x,3x=2y-4

so l v e f or x, 3 x = 2 y - 4