Why write solutions when solving equations

Why write solutions when solving equations

There is no need to write the solution for a series of equations
Write the solution by solving the equation
Because it's a question, it's an answer
The process of writing out the solution according to the meaning of the question
Make the answer standard and clear

x（46-2x+3）=299

x（46-2x+3）=299
x(49-2x)=299
49x-2x²-299=0
2x²-49x+299=0
2(x-13)(x-23/2)=0
X = 13 or 23 / 2

The equation 3x-4y = 5 is transformed to express y with a linear expression containing X

The result of the transfer is as follows:
--4y=5--3x
Divide both sides by -- 4 to get:
y=3x/4--5/4

The equation 5x-6y = 12 is transformed: if x is expressed by the formula of Y, then X=______ When y = - 2, X=_______ If y is expressed by a formula containing x, then y=____

If x is expressed by the formula of Y, then x = (6 / 5) * y + 12 / 5
When y = - 2, x = 0
If y is expressed by a formula containing x, then y = (5 / 6) * x - 2

The equation 1.5x-3y = 1 is transformed into a formula containing x to express y, and the corresponding values of Y are obtained when x = 0, x = 1 / 2 and x = 2, respectively

3y=5x-1
y=(5x-1)/3
x=0
y=(0-1)/3=1/3
x=1/2
y=(5/2-1)/3=1/2
x=2
y=(10-1)/3=3

The equation 3x-1 / 2Y = 5 is transformed to express y with a linear expression containing X

y=1/2(3x-5)

1. By transforming equation 3x-2y = 9, y = (), x = ()
2. The common solution of equation y = 2x-3 and equation 3x + 2 = 1 is ()

1. By transforming the equation 3x-2y = 9, we can get y = (1.5x-4.5), x = (3 + 3 / 2Y)
2. The common solution of equation y = 2x-3 and equation 3x + 2 = 1 is (x = - 1 / 3, y = - 11 / 3)
You can also ask me questions here:

The transformation of 3x-2y = 25 is to use the formula containing y to express x, find y = - 4, y = 7

3x=25+2y
x=(25+2y)/3
y=-4
x=(25-8)/3=17/3
y=7
x=(25+14)/3=13

The equation 5x-2y = 7-y can be transformed to y=____ ,x=______
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The equation 5x-2y = 7-y can be transformed to y=__ 5x-7__ ,x=(7+y)/5______
5x=7+y;
x=(7+y)/5;
y=5x-7;
I'm very glad to answer your questions. Skyhunter 002 will answer your questions
If you don't understand this question, you can ask,

Solving inequality 4x + 3 ≤ 2x + 7 15-9x1

4x+3≤2x+7
Two sides simultaneously - 2x: 2x + 3 ≤ 7
Two sides simultaneously - 3: 2x ≤ 4
Divide two sides simultaneously: X ≤ 2
The above is a more stupid method, the best is to use shift: a number or unknown to the other side, sign change
When multiplying and dividing a positive number at the same time, the direction of inequality remains unchanged
When multiplying and dividing a negative number at the same time, the direction of inequality changes
15-9x1 or 2x + 3-1 or X