Question

5* (4-3x) -4* (7-4x) =1,3

Answer 1

5(4-3х)-4(7-4х)=1,3;
20-15х-28+16х-1,3=0;
х-9,3=0;
х=9,3.

Answer 2

5×(4-3х)-4×(7-4х)=1,3
1. Открываем скобки. 
20-15х-28+16х=1,3
2. Складываем и вычитаем. 
Х-8=1,3
3. Вычисляем х.
Х=1,3+8
Х=9,8
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Answer 3

To solve the equation 5*(4-3x) -4*(7-4x) = 1,3, we need to follow these steps:

- First, we need to apply the distributive property of multiplication over addition and subtraction to both sides of the equation. This means that we multiply each term inside the parentheses by the factor outside the parentheses. For example, 5*(4-3x) = 5*4 - 5*3x = 20 - 15x. Doing this for both sides, we get:

20 - 15x - 4*(7-4x) = 1,3

- Next, we need to simplify both sides of the equation by combining like terms. Like terms are terms that have the same variable and the same exponent. For example, -15x and -4*(-4x) are like terms because they both have the variable x and the exponent 1. To combine like terms, we add or subtract their coefficients. For example, -15x - 4*(-4x) = -15x + 16x = x. Doing this for both sides, we get:

20 - 15x - 28 + 16x = 1,3

-8 + x = 1,3

- Then, we need to isolate the variable x on one side of the equation by adding or subtracting the same number to both sides. For example, to get rid of -8 on the left side, we can add 8 to both sides. Doing this, we get:

-8 + x + 8 = 1,3 + 8

x = 9,3

- Finally, we need to check our solution by plugging it back into the original equation and see if it makes the equation true. For example, if x = 9,3, then 5*(4-3x) -4*(7-4x) = 5*(4-3*9,3) -4*(7-4*9,3) = 5*(-23,9) -4*(-29,2) = -119,5 + 116,8 = -2,7. This is not equal to 1,3, so x = 9,3 is not a valid solution.

Therefore, the equation 5*(4-3x) -4*(7-4x) = 1,3 has no solution. This means that there is no value of x that makes the equation true. You can also use an [algebra calculator](https://www.mathway.com/algebra) or [Microsoft Math Solver](https://mathsolver.microsoft.com/en/algebra-calculator) to check your answer.