Question

Б) 17х-12х+16х=64,68 в) 28,8:х-3,9=20,1 г)38у-5у-12у= 64,89 д)5/18+(15/18_(х-7/18) =11/18

Answer 1

Б) 17х-12х+16х=64,68
5x =64,68
X=12,936
в) 28,8:х-3,9=20,1
x =28,8:(20,1+3,9)
X=1,2
г)38у-5у-12у= 64,89
21y=64,89
Y=3,09
д)5/18+(15/18_(х-7/18) =11/18
5+15-18x+7=11
27-18x=11
X=(27-11):18
$x = \binom{8}{9}$

Answer 2

To solve each of the equations, we'll isolate the variable on one side of the equation. Let's go through each one step-by-step:

а) 17х - 12х + 16х = 64.68

Combine the x terms on the left side: (17 - 12 + 16) x = 64.68

Simplify the left side: 21x = 64.68

Now, isolate x by dividing both sides by 21: x = 64.68 / 21 x ≈ 3.08

So, the solution for x is approximately x ≈ 3.08.

б) 28.8 / х - 3.9 = 20.1

Add 3.9 to both sides to move the term containing х to one side: 28.8 / х = 20.1 + 3.9 28.8 / х = 24

Now, isolate х by multiplying both sides by х: х * (28.8 / х) = х * 24

The х on the left side cancels out, leaving: 28.8 = 24х

Now, divide both sides by 24 to solve for х: х = 28.8 / 24 х = 1.2

So, the solution for х is х = 1.2.

г) 38у - 5у - 12у = 64.89

Combine the y terms on the left side: (38 - 5 - 12)у = 64.89

Simplify the left side: 21у = 64.89

Now, isolate у by dividing both sides by 21: у = 64.89 / 21 у ≈ 3.09

So, the solution for у is approximately у ≈ 3.09.

д) 5/18 + (15/18) * (х - 7/18) = 11/18

First, distribute (15/18) into (х - 7/18): 5/18 + (15/18) * х - (15/18) * (7/18) = 11/18

Now, simplify the equation: 5/18 + 5/18 * х - 35/18 = 11/18

Next, move -35/18 to the right side by adding it to both sides: 5/18 * х = 11/18 + 35/18 5/18 * х = 46/18

Now, isolate х by multiplying both sides by 18/5: х = (46/18) * 18/5

The 18 on the left side cancels out, leaving: х = 46/5 х = 9.2

So, the solution for х is х = 9.2.

I have solved all four equations, and each solution is as follows:

а) x ≈ 3.08 б) x = 1.2 г) у ≈ 3.09 д) х = 9.2