12x + 9x = 60.9 how to solve this equation, kind-hearted person, do me a favor, speed! Today!

12x + 9x = 60.9 how to solve this equation, kind-hearted person, do me a favor, speed! Today!

12X+9X=60.9
21X=60.9
X=60.9/21
X=2.9

Solution equation: 9x ^ 2 + 12x + 4 = 9

9x^2+12x+4=9
(3x+2)^2=9
(3x+2)=±3
x=-2/3±1

2x-12x-4 + 3 = 9-9x to solve the equation 4x-60 = 10x-60

2x-12x-4+3=9-9x
2x-12x+9x=9+4-3
-x=10
x=-1
4x-60=10x-60
4x-10x=-60+60
-6x=0
x=0

The solution equation: 12x-56 = 1249.2 + 0.9x = 20

12x=56+124
x=15
0.9x=20-9.2
x=1.2

Solution equation: 9x ^ 4-12x ^ 2 + 4 = 0

Multiply the cross to get (3x & # 178; - 2) &# 178; = 0
That is, 3x & # 178; - 2 = 0
x² = 2/3
∴x = ±√6/3

Solving equation x ^ 4-9x ^ 2 + 12x-4 = 0
"^" means square

If we divide the original formula by X-1, then we have X ＾ 3 + X ＾ 2-8x + 4 = 0. At this time, it is easy to see that there is x = 2, or we can solve the equation of three equations. If we divide the original formula by X-2, then we have X ＾ 2 + 3x-2 = 0. We can get that X has two values, two-thirds minus three plus minus root sign 17, which is a total of four values

If the solution of the equation 9x-a = 0 of X is x = 9-A, then a equals 0_____

9x-a=
x=a/9
So a / 9 = 9-a
a=81-9a
10a=81
a=8.1

Four fifths x plus two equals the equation X

4X / 5 + 2 = x 4x + 10 = 5x x = 10 question: 4x + 2 is equal to 4 / 5 of X equation answer: your question is not clear, if it is: 4x + 2 = x, then x = 10.5 (4x + 2) = x, then x = 4 / 5 (x + 2) = x, then x = 8 question: 4x + 2 = x, then x = 10

Given that one root of the equation 2x ^ 2-9x + 10 = 0 is 5 / 2, find another root

Let two be x1x2
x1+x2=9/2
x1*x2=5
x1=5/2
x2-=2
.

How to solve the equation x × 15% x = 3.22

X+15%x=3.22
1.15x=3.22
x=3.22÷1.15
x=2.8
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