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受欢迎的代数 >

(3x+5)+(10x-7)=180

解答

(3 x + 5) + (10 x - 7) = 180

解答

x = 14

求解步骤

(3 x + 5) + (10 x - 7) = 180

去除括号:

(a) = a

3 x + 5 + 10 x - 7 = 180

对同类项分组

3 x + 10 x + 5 - 7 = 180

同类项相加:

3 x + 10 x = 13 x

13 x + 5 - 7 = 180

数字相加/相减:

5 - 7 = - 2

13 x - 2 = 180

将

2

到右边

13 x = 182

两边除以

13

x = 14

作图

流行的例子

2(3x-4)+5(2x+3)=-9

2 (3 x - 4) + 5 (2 x + 3) = - 9

2 x + 1 = - 1 + 2 x

\frac{4 v - 2}{3} + 8 = 5 v

x (x - 3) = (x - 3)^{2}

solvefor x,-x+y=8

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