Question

(5/12x+3,3)-(4/15x-2,7)=9 -1,8x+26=50-(14+2x)

Answer 1

Ответ:

вот решение и ответ, вроде правильно.

1. x=20

2.x=50

Answer 2

To solve the equation, let's simplify each side step by step.

For the first equation: (5/12x + 3,3) - (4/15x - 2,7) = 9

First, let's simplify the left side by subtracting the parentheses: 5/12x + 3,3 - 4/15x + 2,7 = 9

Next, let's combine like terms: (5/12x - 4/15x) + (3,3 + 2,7) = 9

To combine the x terms, we need a common denominator for 12 and 15, which is 60: (25/60x - 16/60x) + 6 = 9

Simplifying the x terms: 9/60x + 6 = 9

Now, let's isolate the x term by subtracting 6 from both sides: 9/60x = 9 - 6 9/60x = 3

To eliminate the fraction, we can multiply both sides by the reciprocal of 9/60, which is 60/9 or 20/3: (9/60x)(20/3) = 3(20/3)

Simplifying: (3/1)x = 20

Finally, divide both sides by 3 to solve for x: x = 20/3 or x = 6.67

Moving on to the second equation: -1.8x + 26 = 50 - (14 + 2x)

First, let's simplify the right side: -1.8x + 26 = 50 - 14 - 2x

Combining like terms: -1.8x + 26 = 36 - 2x

Next, let's isolate the x term by adding 1.8x to both sides and subtracting 36 from both sides: -1.8x + 1.8x + 26 - 36 = 36 - 2x + 1.8x - 36

Simplifying: -10 = -0.2x

To solve for x, divide both sides by -0.2: -10 / -0.2 = -0.2x / -0.2

Simplifying: 50 = x

Therefore, the solution to the system of equations is x = 6.67 and x = 50.